From Black Lion Audio
The preamp and line amp circuitry found in the B173 500 is identical to the original B173. Not a single component or design feature was compromised while converting it to a smaller package. As a result, the circuit boards are jam packed with all sorts of delicious components, including a brawny Cinemag input transformer!
The power supply is the backbone of any preamp design, and can make a huge impact on the overall sound and performance of the preamp. The +24V rail needed to power the B173 500 is painstakingly converted from the +/- 16V rails of a 500 series rack using a custom DC-DC converter circuit specially designed to keep any unwanted noise or modulations out of the signal path. Complete isolation is then achieved through the use of inductors, ferrite beads, decoupling capacitors, power regulation, and a custom enclosure surrounding the entire circuit.
The B173 500’s “Class A”, discrete circuitry combined with high-end components provide a fresh approach to a classic sound that won’t disappoint!
Features
500 Series format (500 series rack required for use)
Cinemag Input Transformer
Edcor Output Transformer
80dB Gain
Hi-Z Input (passive, unbalanced)
Phantom Power
Phase Switch
Output Attenuator
Mic Section
- Max Microphone Input Level
- +1 dBu
- Input Impedance
- 200Ω
- Gain
- +12dB to +80dB
- Equivalent Input Noise (noise floor)
- -103dB
- THD+N (@ +4dBu output)
- .072% @ +8 dBu Gain
.074% @ +29 dBu Gain
.082% @ +44 dBu Gain
.152% @ +60 dBu Gain
.709% @ +76 dBu Gain
- Bandwidth (1kHz, 150Ω source, unweighted)
- 10Hz to 30kHz
Hi-Z Section
- THD+N (@ +4dBu output)
- .0045% @ +10 dBu
.0076% @ +15 dBu
Output Section
- Max Output Level
- +29dBu
- Output Impedance
- 600Ω
- Power Supply
- +24V provided by ultra low noise,
custom power supply (500 series rack
required)
- Product Dimensions
- 1 .5” x 6.5” x 5.25”
- Product Weight
- 1.2 lbs
- Shipping Dimensions
- 13” x 13” x 5”
- Shipping Weight
- 3 lbs
Free 3-Year Warranty
Sound Pure stands behind our products. Free three-year warranty on this item. Coverage exclusions live in Terms & Conditions, Section 27.
Level of support and expertise that simply isn't available at big-box megastores. Read the warranty →
Returns
Not eligible for Try Before You Buy or the 48-hour approval period. Standard return policy applies — see Terms & Conditions, Section 18 for details.
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