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VT-737SP

Avalon Design VT-737SP
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Description

PREAMPLIFIER
The VT-737SP has three input selections: 1. The VT-737SP features a higher-performance microphone input transformer with +48v phantom selection. 2. Instrument DI high source input with jack located on front panel. 3. Balanced line input, discrete high-level Class A. The Class A preamplifier utilizes two cascaded, dual vacuum tube triodes configured with minimum negative feedback. A high gain switch boosts the overall gain of the preamplifier. The four high quality tubes are configured as singled ended anode coupled followers. A passive-variable high pass filter and hard-wire relay bypass completes the input signal conditioning. The phase reverse relay is available on all three inputs.

OPTO-COMPRESSOR
The opto-compressor features a minimum signal path design with twin Class A vacuum tube triodes for gain matching. The optical attenuator acts as a simple passive level controller. Full dynamic control from soft compression to hard- knee limiting can be achieved with threshold, ratio-compression, attack and release controls plus gain reduction selection on the large VU meter. Special spectral control including de-ess is available with the dual sweep mid EQ to side-chain switch. The EQ section can be flipped pre or post the opto-compressor via a front panel switch for alternate effects and tone shaping. Two VT-737SPs can be linked via a rear panel link cable for stereo tracking. The compressor bypass is a sealed silver relay for the most direct signal path.

SWEEP-EQUALIZER AND OUTPUT LEVEL
The VT-737SP equalizer utilizes 100% discrete, Class A-high-voltage transistors for optimum sonic performance. The high and low frequency bands provide the smooth characteristics of an all passive design, while the dual mid bands include variable frequency and switched Q-width selection. The enhanced range of the mid bands is extended into the high and low bands by the use of X10 frequency multipliers. The bypass switch incorporates a sealed silver relay for the most direct signal path. When the EQ to sidechain is engaged, the high-low EQ remains in the audio path for "tone enhancement". The output level control provides a variable control of the overall signal path. The output amplifier utilizes another dual triode vacuum tube driving a 100% discrete, Class A, high-current, balanced and DC coupled low noise output amplifier.

Discussions

Universal Audio Releases UAD Software v9.11 Featuring the Avalon 737 Channelstrip

New UAD Plug-In from Universal Audio Avalon VT-737sp Tube Channel Strip with Unison technology New UAD Plug-Ins from Direct Development Partners Antares Auto-Tune Realtime Access (Antares) Sonnox Oxford SuprEsser DS (Sonnox) Diezel VH4 Amplifier with Unison technology (Brainworx) Other Enhancements and Changes (Mac) UAD software can be installed on macOS 10.15 Catalina (API 2500) High resolution graphics for macOS Retina displays (Moog Filter...

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Bae 1073 vs Shelford Channel

...next tube pre IS a fearn. Before landing on the REDD, I tried tubetech’s pre, ua 610, retros channel, Avalon 737, and cranesong . The winner being the REDD. At low gains, it does not distort, paired with a condenser like a u87/67/251, it doesn’t need a ton of gain and operates fairly transparent....

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Bae 1073 vs Shelford Channel

Thanks for your thoughts. On that track, the sibilance sticks out. Was that your EQing?

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