Avalon Design VT-737SP w/ Free Gear

The Avalon VT-737SP features a combination of TUBE preamps, opto-compressor, sweep eq, output level and VU metering in a 2U space.
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.

AVALON VT-737SP FEATURES

Vacuum tube triode signal path, transformer balanced microphone input, high-voltage circuits for maximum headroom to +30dB, low noise -92dB, internal discrete power supply with toroidal transformer, soft-start tube life extender, stereo link for compressors, all discrete Class A equalizer with musical passive filter design, sealed silver relays for signal routing, large control knobs with professional conductive plastic potentiometers, VU meter for output level monitoring and compressor gain reduction.

VT-737SP SPECIFICATIONS

• Circuit topology Four dual triode vacuum tubes (Sovtek 6922), high-voltage discrete Class A
• Gain Range Microphone: Transformer balanced 850/2500 ohm, 0dB to +58dB Instrument: Unbalanced
• 1 meg ohm, 0dB to+30dB Line: Balanced Class A 20k ohms, -27dB to 28dB
• Maximum input level and connector types Microphone26dB@25Hz, +30dB@1kHz balanced XLR
• Instrument+30dB unbalanced front panel jack socket Line +36dB balanced XLR
• Maximum output level +30dB balanced 600 ohms, DC coupled, discrete Class A
•  Output type and gain XLR connector, output trim gain -45dB to20dB
• Noise 20kHz unweighted -92dB
• Noise microphone EIN -116dB, 22Hz to 22kHz unweighted
• Distortion THD, IMD 0.5%
• Frequency response -/2.5dB 10Hz to 120kHz input filter included
• Frequency response -3dB 1Hz to 200kHz line in-out
• VU meter and gain reduction High quality illuminated OVU =+4dB and gain reduction to -20dB
•  High cut filter Variable 6dB per octave 30Hz to 140Hz
• Compressor type Optical passive attenuator incorporating twin vacuum tubes and stereo link
• Threshold - Ratio Threshold variable -30dB to +20dB, ratio-compression variable 1:1 to 20:1
• Attack - Release Attack variable 2mS to 200mS, release variable 100mS to 5 seconds
• Equalizer type Discrete Class A, variable active and switched passive design
• Frequency bands (4) Treble - switched 10kHz, 15kHz, 20kHz, 32kHz, +/- 20dB range, shelf High mid - variable 200Hz to 2k8Hz and 2kHz to 28kHz, +/- 16dB range, hi-lo Q Low mid - variable 30Hz to 450Hz and 300Hz to 4k5Hz, +/- 16dB range, hi-lo Q Bass - switched 15Hz, 30Hz, 60Hz, 150Hz, +/- 24dB range, shelf
• AC power Internal toroidal 100v to 240v, 50-60Hz selectable, 75 watts maximum
• Dimensions 19 x 12 x 3.5 in (482 x 305 x 89mm)
• Weight 22lbs (10kg)
• Dimensions-shipping carton 21 x 18 x 8 in (533 x 457 x 203mm)

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CASCADE FAT HEAD- RIBBON

 

 

The Cascade FAT HEAD offers the natural and open sound associated with the finest ribbon microphones. You will find that when recording acoustic guitars, guitar cabinets, vocals, drum over-heads, and countless other types of instruments, the ribbon microphone will produce the warmth that is vital to today's digital recording environment. We firmly believe you will also agree that this microphone will make a great addition to your collection.

We inspect and check the audio quality of each and every Cascade microphone before it leaves our shop, once you try one...you'll be a believer. 

• Type: large geometry (LRG) ribbon (velocity) Microphone
• Ribbon type & Dimensions: Pure aluminum, 2.5 microns, 1 3/4" (L) X 3/16" (W)
• Polar pattern: Figure 8
• Sensitivity: -56 db +/- 2 dB (0 dB=1V/Pa)
• Frequency response: 30 to 15 KHz (+/- 3dB)
• Impedance: <=600 Ohms
• Recommended load impedance: 3000 Ohms
• Max.SPL (1% THD @1000 Hz): 148 dB
• Equivalent noise level: to IEC 268-4 (A weighted) 18 dB
• S/N ratio: re 1Pa: 70 dB
• Connector: 3-Pin male XLR
• Size: Diameter: 3” (O.D. grill), overall length 6 1/2”, 7/8" (O.D. body)

• FAT HEAD Ribbon (LGR) Premium suspension shockmount  
• Zipper vinyl pouch w/ protective storage
• Micro-fiber cleaning cloth

Cascade M37 is a cardiod condenser that has a 21mm diameter diaphragm. It is ideal for use as drum over heads, hi-hat, snare, or acoustic instruments such as guitar and piano. The M37 features a high SPL rate of 137dB for capturing even the loudest of sound sources. It is the choice compact microphone for instrumental use in professional studios around the world.  

• 2 x Cascade M37 small cardioid condenser microphone
• 2 x Std. style microphone mounting clip
• 2 x Vinyl zipper pouch
• 2 x Foam Windscreen
• Micro-fiber cleaning cloth

• 21mm diameter diaphragm
• Power: P24V or P48V Phantom Power
• Phasing: Positive pressure on diaphragm generates a positive voltage on pin #2 relative to pin #3
• Generating Element: Externally Biased Condenser
• Polar Pattern: Unidirectional (Cardioid)
• Frequency Response: 30Hz-20kHz
• Sensitivity: -56dB 0dB=1V/uBar@1kHz
• Impedance: Low (Less than 200 Ohms)
• Equivalent Noise Level: +14dB (A-weighted)
• Weight: 126 Grams
• Connector: 3 pin XLR 

Warranty  Full coverage for one year from date of purchase