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Old 12th January 2016
Lives for gear
WATSON AUDIO : custom high end mastering gear

Some of you know my custom builds I have posted about a few time.

Mark's not one for self publicizing but he has two new designs he's allowed me to share so here they are

(FYI I don't financially gain from this in any way!)

Watson Audio Mastering Equipment

Tilt EQ

A stereo linked 1U 19” rack mount Tilt EQ for tweaking the overall balance of light and dark centered on a “sweet spot” or crossover frequency, nominally 650Hz.

As the Tilt is engaged, an HPF and LPF mirrored pair work in opposition to each other to add top end while removing bottom end or vice versa.

The unit is essentially a stripped down MEP250, using the entire structure of this legendary EQ, including the I/O section and EQ gain handling using centre-tapped pots, giving the Tilt it’s impeccable sound quality and very low THD+N and phase distortion characteristics.


Gain: -1.25dB to +1.25dB cut/boost in 0.25dB increments

Crossover: 460, 550, 650, 770, 920Hz

(spans 2 octaves in musical increments)

THD+N: 0.0007% (1000Hz +4dBu input)

Phase distortion: <6 deg. At maximum cut/boost


* Takamisawi bypass relays

* Hard bypass routing ins to outs bypassing the entire unit

* Individual hard bypass on LPF and HPF allowing independent use of the filters, meaning you can just use the low pass or the high pass separately

* Top quality Wima polypropylene and Panasonic low ESR electrolytic capacitors

* Silver mica bypass capacitors

* Styroflex filter tuning capacitors

* Gotham Audio hookup cable

* Neutrik XLRs

* LM317/337 adjustable low noise, filtered, hum-free psu

* Star ground – all grounds have their own separate pathway back to the main chassis ground making it impossible for hum to be injected into the audio path

£750 including shipping


179-400 Dual Limiter

A dual channel mastering limiter made from two NTP 179-400 cards mounted in a 1U 19” rack mount case with all the onboard controls brought out to the front of the case. No fiddly trim pots for setting the gain, limit level or release times, this is all done with full size potentiometers making it faster and more intuitive to use.

The 179-400 design uses RMS peak detection making it far less jumpy than standard peak detection limiters giving a smoother, virtually invisible limiting action at higher gain reductions.



16 position rotary switch in 1.5dB increments:

0, 1.5, 3.0, 4.5, 6.0, 7.5, 9.0, 10.5,

12.0, 13.5, 15.0, 16.5, 18.0, 19.5, 21.0, 22.5dB

Limit Level

9 position rotary switch in 1.5dB increments.

Sets the level the limiter will not allow audio to go beyond:

1.5, 3.0, 4.5, 6.0, 7.5, 9.0, 10.5, 12.0, 13.5dB

Release Times

7 position rotary switches.

T1 and T2 form a composite release curve that can be adjusted to fit any material.

T1 F1, F2, 0.1, 0.2, 0.4, 1.0, 2.0 seconds

T2 F1, F2, 0, 1.0, 2.0, 4.0, 10.0 seconds

T2 can be set to zero and switched off entirely leaving the release down to T1 only.


<0.006% No limiting

<0.02% Limiting engaged

(1000Hz +4dBu input)

£850 including shipping

For further info or to make an order, please contact:

Mark Watson

Watson Audio

07544 674083

m.a.watson at hotmail dot co dot uk