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.
All Remotes are now 25% off or Free Shipping!!! (Reel to Reel remotes excluded).
Mic pre with compressors and parametric EQ. Tubes: RCA vintage 12AT7, Sovtek 12AX7. Selected tubes for higher tube character, real nice 12% distortion. Like new demo unit with clean controls, resolder ruggedized board, no rack rash, and original operator's manual. Condition: 9
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.
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
Single channel mic pre EQ compressor. SN:S150861225. New
Like new. All QC checked by Audio Pro. Low noise tubes. In box with manual. #9 condition.
Two channel Mic/HiZ. M/S Matrix. Variable input Impedance. Variable plate voltage. QC- Lubed, Burn-in, switches exercised. #10 Condition (New).
Transformer coupled class A preamplifier. Variable input / instrument input, compressor, parametric EQ. Very low use, minor rack rash. Can be updated to remove SMD caps + replaced with better caps input/output balancing line caps.
Add on 48 volt, some codes are color blue. Rental Unit excellent serious low noise class A preamp design. #8 condition.
We offer expert time-saving advice on repairing many types of home and studio equipment, as well as consulting for product and recording issues, at a fair and reasonable cost. For complex matters, we sometimes must charge a small technical fee. If we can help solve your repair problem or technical conundrum, give us a call. (617)926-8020.
Two channel tube mic preamplifier. New. Highly recommended product!
Dual vacuum tube preamplifier. 2 channels, each with 1/4" and XLR ins/outs. Professionally cleaned and serviced. Some minor scratches on top cover.
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
Re: International Shipping: We ship internationally often and have yet to encounter a problem or complaint. We are very careful to test the equipment before it’s packed and then to double box the machine with added protection when needed for front panels, etc. We are not amateurs or an ebay store; we know these machines very well and know what it takes to get them to you safely. We use USPS priority internationally which seems to be the cheapest. If you prefer another carrier (you should know who delivers to your area reliably) please let us know. Also please be aware of any tariffs that you may be responsible for upon pick up on your end. International shipping may be expensive but we will make sure it is not a headache on top of the cost. PLEASE NOTE THAT SHIPPING INTERNATIONALLY WILL BE A MINIMUM OF $16 EVEN FOR SMALL PARTS.
Studio control center. Project series. 10 condition. New.
Professional tube preamp/opto compressor - limiter/DI, hand-selected 12AX7a tube, +48V phantom power, #10 new in box
