Assembled 73P Class-A Mic Preamp by DIYRE | Carnhill Audio Transformers
The 73P is an authentic, well designed adaptation of the vintage 1073®* mic preamp circuitry to the 500-series format. The 73P is authentic in that it uses only components that are hand-selected to match the original. There are no changes to any of the preamp circuitry. The 73P preamp was created to mimic the the original three-stage amplifier design. DIYRE’s guiding principle in designing the 73P was to get everything right. Every choice from the use of Carnhill audio transformers, to the hue of the front panel, was carefully considered and compared to the original design. The 73P features a unique power regulator circuit, designed to replicate the imperfections of the original Rupert Neve power supply.
DIYRE’s intention with this project is to recreate the mic preamp from the 1073 Preamp / EQ module as authentically as possible. In surveying the current field of 1073 style preamps, they noticed two distinct approaches – the “three-stage” and “two-stage” designs. The original 1073 (and 1290) used three stages. This approach uses two high-gain preamp stages, and one low-gain output stage. Neve split the gain between stages this way to keep distortion consistently low at all gain settings. The 73P delivers that highly sought after Neve sound.
The two-stage approach has only one preamp stage, followed by the output stage. This is based on yet another Neve module, the 1272 line amplifier. Around the 90’s people started racking these modules and adding gain switches to convert them into mic preamps. Since then, several companies have made two-stage preamps, often named after the 1073 even though they are closer to the 1272. These can still sound great, and some are highly regarded. The two-stage approach is appealing because it reduces cost and complexity. Especially true for a compact 500-series module. In the end – after research and evaluating a vintage 1272. Peterson Goodwyn at DIYRE decided to go with the 3 stage design. More faithful to the 1073, the three-stage design allows for more gain and better audio performance.
Fully Assembled & Tested: Hand assembled with care and passion by the Big Noise staff, in the united states. The 73P Class-A Mic Preamp build embodies high quality components and craftsmanship, we test and characterized each unit after assembly. For unit operation install the 73P preamp in a 500-Series lunch-box or rack-mount chassis with power supply.
73P Class-A Mic Preamp | Official Beat Maker Equipment & Provisions | ★ ★ ★ ★ ★
FEATURES / SPECIFICATIONS:
- Fully Assembled 73P Class-A Mic Preamp
- Fully Compatible with 500-Series Format
- 3-Stage Mic Preamp Based on The 1073® Preamp
- High Quality Grayhill 12-Position Gain Switch
- LINE Mode Turns Preamp Into Line-Level Input
- LO Z Switch Input Impedance 1.2k and 300 Ohms
- Carnhill Input and Marinair Output Transformers
- On-Board Regulator Boosts Voltage to +24 DC
- 73P Not Designed / Manufactured by AMS Neve Limited
Big Noise Audio | bignoiseaudio.com | Custom Audio Designs
Handling: 10 to 15 Business Days | Cost covers shipping and signature confirmation.
Shipping: This product can be shipped using USPS Priority Mail, UPS and FedEx.
100% SATISFACTION GUARANTEED | QUALITY PRODUCT FROM BIG NOISE AUDIO
