Had 10dB higher gain preamp. Full audio pro rev 6 modification. Has T.H.E. tube harmonic equalizer circuit. Updated mic pre with RFI suppression. Updated tube plate volts. Updated low frequency EQ predominance. Phase corrected filter. (No loss of extreme deep bass) Has complete mod of tube vactrol auto compression and EQ at 0 dB. SN 4930. Has box. Condition #9
Modified with transformer, Automatic EQ compressor. This design allows deep bass and impulse response to be enhanced and less high frequency attenuation and clarity enhancement circuit. Unit has a ground modification and capacitor update for 6db noise floor improvement. This version has a 4560 op amp upgrade for line out balanced out. Mic pre amp RFI suppression capacitor. Modified with first stage tube harmonic bias control (right control) Cleaned switch with silver paste. #9 condition
Tube mic preamp/compressor/equalizer. AUDIO PRO MODIFIED: Tube Harmonic T.H.E. Bias control transformer in Vactrol EQ Mod. Highly recommended, Super noise spec machine! QC, Test All. #10 new in box
Modified vactrol variable transformer dynamic EQ, and variable tube bias mod. Professional tube microphone pre-amplifier. Tube/optical compressor. +48V phantom power supply. With true "tube gain cell" compressor. B stock. See more details about the mod here, https://www.audioproz.com/AP.php?Article=19&Tab=Modifications
Studio tube compressor/limiter preamp. AudioPro modifications to optimize tube gain and noise, power supply updates, phase switch pad and hi gain switch added on front panel. Excellent #9 condition.
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Class A mic preamp. Tube Preamp, compressor, eq. Super spec unit. Special upgrade. Updated power supply to run any type tube, new, old etc. Unit can run on 90 VAC line current. Special bypass capacitors on power supply. New in box, QC - low noise spec.
8 channel mic preamp, add on 48v power, extremely high gain low noise full bandwidth mic pre, 2 space rack unit, excellent conditon
Two Channel Tube Mic Preamp with digital outs. XLR I/O, 1/4 inch output. AES/EBU, SPDIF, ADAT, Optical outputs. Word Clock in/thru. Sample rate control. MS Matrix. Variable input impedence. Minor rack rash.
Two Channel Tube Mic Preamp with digital outs. XLR I/O, 1/4 inch output. AES/EBU, SPDIF, ADAT, Optical outputs. Word Clock in/thru. Sample rate control. MS Matrix. Variable input impedence. Minor rack rash.
Like new. All QC checked by Audio Pro. Low noise tubes. In box with manual. #9 condition.
We know you have many options for purchasing audio equipment and parts, and we truly appreciate your business. We strive to offer good products at competitive prices. While we can't always match the prices of one isolated reseller, we make up for it by carefully selecting, testing, and finding unique and special rare parts, and we are here for the long run. We guarantee everything we sell and we hope it helps you to enjoy a great listening experience.
Single channel mic pre EQ compressor. SN:S150861225. New
Two channel Mic/HiZ. M/S Matrix. Variable input Impedance. Variable plate voltage. QC- Lubed, Burn-in, switches exercised. #10 Condition (New).
Add on 48 volt, some codes are color blue. Rental Unit excellent serious low noise class A preamp design. #8 condition.
2 Channel Tube Voicing. Mic preamp with 48V Phantom. XLR & 1/4 In's & Outs. Call for best Pricing. Condition 10
2 Channel Tube Voicing. Mic preamp with 48V Phantom. XLR & 1/4 In's & Outs. Condition 10
Read about some of the modifications we do to mic pre's, ART Pro Channel Modification, ART Pro MPA Mic Preamp Modification, ART Pro MPA II Modification, and ART TPS II Modification.
Two channel tube mic preamplifier. New. Highly recommended product!
Two channel tube mic preamp - basic tube mic preamp, 48v phantom, in/out level led meter, 1 rackspace
2 channel tube preamp. XLR, 1/4 inch in/out. New in Box.
2 mic in. 20db pad, gain control 80Hz low cut filter, polarity, phantom. With power supply. 9+ condition. Very low use time. Cleaned controls and switches. One rack scratch.
2 channels, tube gain stage preamp design. Like new unit, has better high-quality power supply. Minor scuff on top. In rack. Condition: 9
Studio control center. Project series. 10 condition. New.
Need your guitar or bass amp tuned up? We are now doing repairs, upgrades, and modifications to all types of guitar amps. Orange, Mesa Boogie, Fender, Marshall, Hughes and Kettner, Peavey, Ampeg, Gibson, Silvertone, etc. Read more about it here
Professional tube preamp/opto compressor - limiter/DI, hand-selected 12AX7a tube, +48V phantom power, #10 new in box
Tube Pre-amp system-has high quality super spec 12ax7 tubes (.25 to .5% 2nd Harmonic). 2 channels with balanced or unbalanced outputs. Input for mic and instrument. Very quiet unit even with use of guitar. Later model not as well voiced for guitar overdrives. Modifications are available - Please call. Low use unit # 8 condition. (Tube Test Demo unit)
