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Kurzweil KA-40 Reviews Please
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ChocolateAVF
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#1
19th August 2009
Old 19th August 2009
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Kurzweil KA-40 Reviews Please

Has anyone had a chance to listen to the new Kurzweil KA-40 Monitor Speakers ?

Any reviews would be greatly appreciated.

Cheeeeeerz
#2
27th August 2009
Old 27th August 2009
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What is this? It just popped up the website of Keymusic (Belgian store), instead they call it Kurzweil KS 40 A:

KEYMUSIC ® - Kurzweil KS 40 A

I've searched Google for both names and I can't find ANYTHING, as if this doesn't exist. Even typing "Kurzweil monitor" in Google gave this thread as the only good result.

The Kurzweil website also doesn't mention any monitor.

What the hell is this???
#3
4th September 2009
Old 4th September 2009
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Innovative music in Australia have them listed at 199 aud.

The KA- 40 has 2 times 40 watt amps/ 4 inch woofer, full range design.
I think that you could trust the name behind these speakers.

I might order mine soon as in like next week.

Cheers
#4
15th October 2009
Old 15th October 2009
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KS40A in the Netherlands are rated 20watts. But can't find a manual anywhere...

Seems like Ghost speakers.
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23rd October 2009
Old 23rd October 2009
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I emailed Kurzweil through their website.

I got this answer;

Thanks for your email. From what we understand in the United States, these are genuine Kurzweil products, although our U.S. Distributor (American Music & Sound) has not chosen to bring them in for sale here. We are working with the headquarters office in Korea to get specifications for our website and provide as much information to our customers as possible. Since the products are for sale in the Netherlands, maybe try contacting the distributor for France or Germany for more info?
#6
26th October 2009
Old 26th October 2009
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Saturday a package arrived. My KS40A package was here.... WOOHOO. The Speakers have very good drivers but the bass is a lil boxy due to the use of (7mm?)MDF . So I plan on opening them and glue some tiney pieces of wood so they sound alil better.

For the price they rock. One lil detail matters though. The amp is in one of the speakers. The other one is passive and will be powered by the other one wich contains the (stereo) amp. It has RCA (Tulip) inputs and two per side. So 4 Tulip inputs in total. It is ment to connect your Kurzweil piano and a cd player or puter for playing along.

And they go LOUD. For what they are. Lil speakers you can use with your laptop based DAW or your piano/synth.
They have an extra bass knob so they can be boomy if desired (so even a loud R&B mix will sound good).

So all in all it are great lil speakers. The only downside to me is the amp being in one of them speakers. And I would have appriciated a bag to carry them around by Kurzweil (paid extra), but I will find something suitable....
#7
27th September 2010
Old 27th September 2010
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Quote:
Originally Posted by muziekschuur View Post
Saturday a package arrived. My KS40A package was here.... WOOHOO. The Speakers have very good drivers but the bass is a lil boxy due to the use of (7mm?)MDF . So I plan on opening them and glue some tiney pieces of wood so they sound alil better.

For the price they rock. One lil detail matters though. The amp is in one of the speakers. The other one is passive and will be powered by the other one wich contains the (stereo) amp. It has RCA (Tulip) inputs and two per side. So 4 Tulip inputs in total. It is ment to connect your Kurzweil piano and a cd player or puter for playing along.

And they go LOUD. For what they are. Lil speakers you can use with your laptop based DAW or your piano/synth.
They have an extra bass knob so they can be boomy if desired (so even a loud R&B mix will sound good).

So all in all it are great lil speakers. The only downside to me is the amp being in one of them speakers. And I would have appriciated a bag to carry them around by Kurzweil (paid extra), but I will find something suitable....

What do you mean by 'boxy'?
A friend of mine is about to buy a pair for his first monitors, would these be enough in your opinion?

Cheers
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27th September 2010
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Yes,

If the room is not too big, or you understand how to monitor at a moderate level.
#9
1st November 2010
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And what the hell is Stevie Wonder Endorsed all about???
#10
1st November 2010
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#11
22nd November 2010
Old 22nd November 2010
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so are they any good?

im an audio engineering student and after buying a macbook pro and protools i really dont have much money to spend anymore on speakers

saw these pretty cheap and a lot of people been talking about how good they are for the price (some even say they are better than the m-audio studiophile AV series - is this true??)

just wanna know what people think about their sound quality and clarity, doesnt have to be loud , sound "clean" , anyone got one and can share something>?
#12
23rd November 2010
Old 23rd November 2010
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Yes.

I like em..
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23rd November 2010
Old 23rd November 2010
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Quote:
Originally Posted by muziekschuur View Post
Yes.

I like em..
really? can you please give more comments on them?

they didnt even specify the frequency range etc, are they good "el cheapo" monitor speakers for beginner audio engineers with no much cash left? lol
#14
23rd November 2010
Old 23rd November 2010
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Yes they are. They sound great. A pair of these and a pair of Yamaha HS50's and you could easily cut records. A Quadcore pc, a remote controller and a decent audio interface, some mics and off you go. And if you allso could find some old Pioneer speakers to make your own Auratones (just go to a cardemolitionsite then find a truck and get those speakers out). So now you have an isolated mid (auratone) a mixingspeaker with hyped midlow (HS50) and a nice hifi kinda speaker. I allso have two 4way speakers and those really glorify any soundsource. Not so for the HS40. If the source is too loud, the speaker will distort. Wich is kinda neat, cause you'll know you are tracking/mixing too loud... My Alesis Pro active 5.1. do that too. (wich is the Logitech Z680 and very similar to the Logitech Z5500 (still available for around 240 euro)

Don't forget to read the manual. The KS40 accepts two line sources. One is ment for a digital piano and has some sort of eq in it. (Possibly some thing that cuts the lows of the keyboard (if you have a 88 note keyboard, those low notes kick every woofers butt). The other input is for true line sources.
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23rd November 2010
Old 23rd November 2010
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Quote:
Originally Posted by muziekschuur View Post
Yes they are. They sound great. A pair of these and a pair of Yamaha HS50's and you could easily cut records. A Quadcore pc, a remote controller and a decent audio interface, some mics and off you go.
yes all my money have went into a macbook pro, protools 8 + mbox 3 and now i got peanuts to spend on speakers hahaha (and have to survive on instant noodles for weeks!) , aniway thanks for the input will be heading to a local shop and give them a listen
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23rd November 2010
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Heya, they will not let you down I'm sure.

Another tip. Find a padded bag or maybe an old suitcase (samson (you know, your dad and grandpa carry them around to work) so you can take em with you if needed and they will not get damaged.

Genelec sells such stuff for theirs... So their users do so often asswell (I mean, a laptop is for carrying around, aint it...)
#17
29th November 2010
Old 29th November 2010
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Hi,

I was interested in these speakers. Anyway, from the specs and the general layout, they are Empire R1000 rebranded with a different cabinet. Same rear panel layout, same Line A with 9db treble boost, same drivers diameters, similar RMS Watts. Thus, they should be pretty decent monitors, given the good Empire R1000 sound quality. But the Empire are even cheaper...

My two cents.
#18
4th December 2010
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just bought one today at a ridiculously low price (on special end of year sale)

i must say for the price they are pretty damn awesome!!

very clean sound, not heavily drowned by the bass, overall very clean sounding speakers, im very happy with the purchase!
#19
18th December 2010
Old 18th December 2010
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Howard Johnstone is offline
Indeed, They are very good value for money but:

Important improvements can easily be made:

1) Remove the backplate and change the uA4558 (2x741 type opamp)
to NE5532 or eq. (Great improvement in overall sound quality resolution)

2) Increase the capacitance of the two cheap capacitors by, exchange
(best) or by adding another 2200uF/35VDC on the solder side.
The capacitors are small and of poor quality (high impedance)
Low impedance, 4700uF/35VDC will fit nicely

Suddenly, you have a couple of Fostex "copies"
#20
19th December 2010
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Quote:
Originally Posted by Howard Johnstone View Post
Indeed, They are very good value for money but:

Important improvements can easily be made:

1) Remove the backplate and change the uA4558 (2x741 type opamp)
to NE5532 or eq. (Great improvement i overall sound quality resolution)

2) Increase the capacitance of the two cheap capacitors by, exchange
(best) or by adding another 2200uF/35VDC on the solder side.
The capacitors are small and of poor quality (high impedance)
Low impedance, 4700uF/35VDC will fit nicely

Suddenly, you have a couple of Fostex "copies"
Interesting. Did you find this out yourself through experimentation, or through a recommendation. I'm definitely getting a pair anyway so it will be interesting to see what kind of mods there could be and how it would compare to the original. Any measurements?
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19th December 2010
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Improvements

Well, there are of course additional std. improvements you can do
such as improved internal bracing (as mentioned in above thread)
and better internal & denser damping material.

With all these improvements the results are in fact impressive
for the cost of these small active speakers, made by Edifier OEM.

The results are my own, i have however not as good a Dead room
as should be used (Using an old EMC-test chamber instead).
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19th December 2010
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I like the fact they are a lil bland. This way they will shine when the mix is "there". I'm afraid with any modifications they will "sound too good to be true". And in fact sound more like HIFI speakers. Wich is not my intent.
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19th December 2010
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Howard Johnstone is offline
Observe that these are the only improvements worthwhile,
and they are just improvements (Exchange for better quality components)
not modifications to the design itself. The point is that this can be made
into a cheap studio monitor, suitable for demo or as a representation gift.
By doing these improvements the design is more or less maximized.
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19th December 2010
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Any other mod suggestions? There will be several but we should find a way of comparing them.

There must be as many possibile mods as there compaitible components.

Any diagrams for that mod?
#25
21st December 2010
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Any UK Dealers in or near London. I swear there was one in London somewhere... But I can't remember where.
#26
27th January 2011
Old 27th January 2011
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Quote:
Originally Posted by Howard Johnstone View Post
Indeed, They are very good value for money but:

Important improvements can easily be made:

1) Remove the backplate and change the uA4558 (2x741 type opamp)
to NE5532 or eq. (Great improvement in overall sound quality resolution)

2) Increase the capacitance of the two cheap capacitors by, exchange
(best) or by adding another 2200uF/35VDC on the solder side.
The capacitors are small and of poor quality (high impedance)
Low impedance, 4700uF/35VDC will fit nicely

Suddenly, you have a couple of Fostex "copies"
Hello there..I got 4558C, TL022CP, LM308AN and NE555CDP among my electronic part trash-bin , may i use any of them for the opamp or shall i buy one of them,which u've mentioned? And also, what's the values of those "crappy" capacitors, which should be changed?

And also i have a plan to use my Creative 4+1 4400's Sub Bass with these speakers to compensate the lackness of low-ends, yet i don't know the exact frequency ranges of both these speakers and the sub. Anyone tried such a thing ?
#27
27th January 2011
Old 27th January 2011
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P.S: I've just opened inside my KS-40A and guess what? I've learned that these speakers are just a clone of Edifier R1200T, seeing the circuit board..It says "Edifier R1000 V4.3" on it lol..Anyway,i've seen the parts which are meant to be changed
#28
16th June 2011
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#29
16th June 2011
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Quote:
Originally Posted by api2500 View Post
And what the hell is Stevie Wonder Endorsed all about???
Stevie Wonder has long endorsed Kurzweil. In fact, As legend has it, Stevie Wonder encouraged Ray Kurzweil to start developing music synths, having previously developed speech synthesis systems.

I have no ideas if Stevie endorses this particular product, but yes, he has been an endorser of Kurzweil Music Systems.


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#30
16th June 2011
Old 16th June 2011
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Quote:
Originally Posted by Slammer88 View Post
P.S: I've just opened inside my KS-40A and guess what? I've learned that these speakers are just a clone of Edifier R1200T, seeing the circuit board..It says "Edifier R1000 V4.3" on it lol..Anyway,i've seen the parts which are meant to be changed
Big thnx for advice! Go buy Edifiers 1200 for $50 as second lo-grade monitors (shit-control) for our second small CR. If it were sold in Russia as Kurzweil, the price would be $200. I also think - what they look like?! But KS-40A looks more as Edifier R800TC with 1200's tweeter.

R1200T



R800TC

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