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In 1987 Steve Firlotte established Inward Connections, bringing years of experience to the marketplace by designing his own line of audio products aimed at the discriminating professional. His initial offering was the Vac Rac TM modular tube audio system which set the pace for products to come, including the DMS Discreet Monitoring System which was the first-time that a control room monitor module was redesigned to fit into a 19" rack unit. The Vac Rac modular system was the result of collaboration by Firlotte and renowned audio designers Steve Barker and John Hall. Hall is the 2006 recipient of the AES Silver Medal Award for his outstanding achievement in the field of audio engineering and his SPA690 Discreet Class A Amp Block is used exclusively in Inward Connections products.
W ebsite: www.inwardconnections.com

Eddie Kramer for Inward Connections
Without question, Inward Connections has some of the finest outboard gear that I have ever heard. For the past two years I have been using them for all of my mixes. The VC500 Series Compressor offers tremendous openness, clarity and punch that allow me to bring out full-bodied tones in everything from a guitar to an orchestra, especially when used in a pair. A wonderful mixing tool for vocals, drums and bass is the StepEQ which has been used on many albums including the recent Jimi Hendrix Valleys of Neptune. The detail with which we can dial in specific frequencies on the StepEQ is a joy. And I’ve found the EQP2 to be a useful weapon in shaping vocal sounds with equal amounts of surgical precision and musical detail. The OPT1A Limiter is the most recent addition to my wide complement of Inward Connections gear and it does an amazing job of steadying a vocal tracking – the 250 HPF on the detector circuit is crucial to the overall effectiveness of the OPT1A’s sound.
I am looking forward to listening, enjoying, and experimenting with future products that Steve Firlotte and Inward Connections has to offer. - Eddie Kramer
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| Vac Rac TSL-3 Stereo Tube Limiter |
| Add warmth and euphonic tube character to your tracks with the venerable TSL-3 Vac Rac from Inward Connections.
Famous amongst professionals for making a vocal sit in a mix without the need for vocal rides, it imparts a wonderful character without sounding "tubby." The elegant way in which it controls transients makes it a must have in the studio for vocals, bass, and buss duties.
Features per channel
- Gain make-up level
- Gain reduction control
- Bypass switch
- Output/Gain reduction switch mode
- Zero adjust trim
- Large 3"x3" VU meter
- LED illumination in all switches & VU meter indication
- Tubes used in both input channels: Input stage - 6072A, Output stage - 12BH7A
- Power Supply: Pure Class A high voltage tube design using 6BM8
- Unit dimensions: 3 rack space. 5.25" Height, 19" Width, 11.5" Depth
- Rugged steel chassis design
- Classic vintage look
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| Mix 690 16 Channel Rack Mixer |
| Built using the same proprietary op-amps as the DEQ-1, this unit sounds very large and fat while still retaining clarity and detail in the high end. The mid range comes across as punchy and perceptually loud, which adds excitement to any mix. The perfect way to relieve your overworked digital mix buss and restore resolution and depth to your mixes.
Features
- 16 line inputs with pan on each channel
- Insert with bypass on the stereo buss.
- Stereo master level pot
- Stereo meters
- Fully discrete
- 20 of the infamous Inward 690 Op-Amp designed by John Hall
- Can be linked with other mixers without sacrificing channels
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| StepEQ Fully Discrete 500 Series Program Equalizer |
With controls reminiscent of the classic Pultec EQP-1A, the Inward
Connections StepEQ is a fully discrete stepped equalizer with an
extremely smooth and musical tone. Perfect for any source demanding
smooth top end and big powerful bottom end response.
Features
- Hi Mid Band Controls
- Frequency switch selects 4K, 8K, 12K, 16K, 20KCS
- -16dB cut level
- Mid Band Peak Controls
- Frequency switch selects 1K, 2K, 3K, 4K, 5K, 8K, 10K, 12K, 16KCS
- Bandwidth control
- +14dB boost level
- Lo Band Shelf Controls
- Frequency switch selects 20Hz, 30Hz, 60Hz, 90Hz, 120Hz
- -16dB cut level
- +14dB boost level
- All Frequency Select Controls are step switches
- All Cut and Boost Level Controls and Bandwidth Control are
continuous variable attenuators
- Bypass switch
- SPA690 all discrete legendary amp blocks
- Differential
balance input transformer
- Balance output transformer
- Double-wide
module fits in standard 500 series rack slots configuration
mechanically and electrically
Specifications
- Input
Impedance: 600 ohms balance
- Output Impedance: 600 ohms balance
- Frequency
Response: +/- 0.5dB to 50KHz
- Output Signal to Noise: -95dB or
greater
- THD + Noise: .01% @ 1KHz/+4dBu
“A wonderful mixing tool for vocals, drums and bass. The detail with which we can dial in specific frequencies on the StepEQ is a joy.” - Eddie Kramer |
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| OPT1A 500 Series Limiter |
Using the legendary SPA690 discrete amp blocks, the Inward Connections OPT1A
has the exact same Optocell gain reduction circuitry as the revered
TSL-3 Vac-Rac tube limiter in a solid state 500 series format. Fully
transformer balanced input and output, along with an all discrete
design insure the sort of top quality audio you would expect from
Inward Connections.
Features include
- Gain reduction control
- Zero adjust trim
- Output level control
- Hi-Pass filter: 250Hz for detector circuit
- Bypass switch
- LED lighted VU meter
- VU meter output/reduction switch
- Link switch
- SPA690 all discrete legendary amp blocks
- Optocell reduction circuitry identical to TSL-3 Tube Limiter
- Balance input and output transformers
- Fits standard 500 series slot configuration mechanically and electrically
Specifications
- Gain Reduction up to 40dB
- Input Impedance >100K ohms balance
- Output Impedance 600 ohms balance
- Frequency Response +/- 0.5dB@20Hz to 50KHz
- Output Signal to Noise -95dB or greater
- THD + Noise .01%@1KHz/+4dBu
- Reserve Makeup Gain +15dB
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| EQP2 2-Band Parametric 500 Series Equalizer |
| Inward Connections EQP2 is a versatile fully parametric 2-band equalizer utilizing the legendary SPA690 discrete amp blocks. Capable of 20db of boost/cut per band, this all discrete design will offer smooth equalization from subtle to extreme.
Features includes
- Low band frequency range 35Hz to 1KHz
- High band frequency range 560Hz to 16KHz
- Maximum boost/cut +/- 20dB
- Range of bandwidth adjustment 0.16 to 2.0 octave
- Bypass switch
- SPA690 all discrete legendary amp blocks
- Differential balance input transformer less
- Balance output transformer
- Fits standard 500 series slot configuration mechanically and electrically
Specifications
- Input Impedance >20K ohms balance
- Output Impedance 600 ohms balance
- Frequency Response +/- 0.5dB@20Hz to 50KHz
- Output Signal to Noise -95dB or greater
- THD + Noise .01%@1KHz/+4dBu
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| VC500 Discrete VCA 500 Series Compressor |
| The Inward Connections VC500 is a VCA compressor for the 500 format and it raises the bar! Master Craftsman Steve Firlotte did not disappoint with the VC500, utilizing the famed SPA690 op-amp with Military Spec construction. The VC500 module is refined enough for mastering or mix buss use, but rocks enough to replace a dbx 160VU on bass or snare, bring out harmonics and air on an acoustic guitar or pump some room mics for a levee breaks effect.
The VC500 can do it all.
Inward Connections VC500 Features
- SPA690 all discrete legendary amp blocks
- Differential balance input transformerless
- Balance output transformer
- Fits standard 500 series slot configuration mechanically and electrically
- Gain Makeup Control +/- 16dB attenuation
- Threshold Control -40dB to +22dB. This allows for low level compression to high level limiting
- Ratio Control ranges from 2:1 to 30:1 to infinity
- Attack Control ranges from .2 milliseconds to 20 milliseconds
- Release Control ranges from .1 seconds to 3 seconds
- Gain Reduction Meter: 10-segment LED meter bar that ranges from -2dB to -20dB
- Hi-Pass Filter: 250Hz for detector circuit only
- Stereo Link Switch allows module detector circuit to be tied to adjacent compressor module. Both link switches have to be in the “UP” position
- Bypass Switch controls a bypass relay
Specifications
- Input Impedance: 20K ohms balance
- Output Impedance: 600 ohms balance
- Frequency Response: +/- 0.2dB@10Hz to 100KHz
- Output Signal to Noise: -95dB or greater
- THD + Noise: .01%@1KHz/+4dBu
- Distortion: .01% THD, +4dBu@1KHz
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| MPD500 Discrete Microphone Preamp/DI |
The Inward Connections MPD500 is a full-featured discrete microphone preamp with DI from the manufacturer of the famed VAC-Rac stereo tube limiter. Using the all-discrete SPA-690 Op-Amp, this design gives a very high-bandwidth and musical tone without a trace of sterility. Features include balanced input and output transformers, output level rotary control and 3 hi-pass filter selectable switches at 70Hz, 100Hz and 200Hz. The MPD500 has a +48VDC phantom power switch, phase reverse switch and ?20dB pad switch and 12-position rotary trim adjustable at 5dB per step within the 25dB to 80dB selectable range. Also featuring a Hi-Z low level line input 1/4” phone jack for guitars, keyboards and low level instruments, the Inward Connections MPD500 fits standard 500 series’ slot configurations both mechanically and electronically.
Specifications
- Input Impedance
- Mic Input: Transformer balanced, 200 ohm nominal input impedance source. Actual impedance 1200 ohms broad band
- Hi-Z Input: >100K
- Output Impedance: 600 ohms nominal transformer balanced output
- Frequency Response: +/- 0.5dB@20Hz to 50KHz
- Equivalent Input Noise: -126dBm
- Output Signal to Noise: -95dB
- THD + Noise: +4dBu@1KHz: .015% (20Hz to 20KHz)
- Maximum Output Level: +21dBm
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