BOULDER 508 – PHONO PREAMPLIFIER

The 508 is well reviewed and the best (and least expensive) entree into the Boulder brand. The  chassis is carved from a single block of metal.  As with all Boulder products, proper XLR inputs and outputs are standard.  I have a Nordost DIN to XLR cable that I'll also be listing and can be added for those in need.  The package also comes standard with Boulder RCA to Balanced XLR converters.  

Features

• • Simple selection of MC or MM modes via switch on the rear panel

  • Elegant casework carved from a solid block of aluminum

  • Balanced inputs mean the perfect interface with the balanced output of phono cartridges

  • Integrated low-cut filter removes excessive low frequency information from warped or damaged records

  • Balanced outputs to minimize distortion and drive long cable runs with no loss of fidelity

  • Precision built and compact main PCB, produced on Boulder’s own surface-mount circuit board manufacturing machinery

I love this unit but I'm downsizing my rig.  The sound of this Boulder 508 had me at hello and I'll be sad to see it go, my loss is your gain (pardon the pun).   

TECHNICAL SPECIFICATIONS

Inputs: 1 pair, via 3-pin XLR

Outputs: 1 pair, via 3-pin XLR

Input Impedance, Maximum MC: 100 ohms, MM: 47k ohms

Output Impedance: 100 ohms, balanced

1 kHz Gain, RIAA MC: 70 dB, MM: 44 dB

Frequency Response: RIAA ±0.5 dB, 20 Hz to 20 kHz

Distortion: THD 0.01%

Noise (EIN): MC 116 nanovolts flat, 20 Hz to 20 kHz

Maximum Output Level: 16 Vrms

Power Requirements: 100, 120, 200, 240 VAC, 50–60Hz

Power Consumption: 15W Maximum

Phono Preamplifier Dimensions 11.5” W x 9.5” D x 2.3” H 

Shipping Dimensions 18” W x 20” D x 5” H
45.7 cm W x 51 cm D x 12.7 cm H 

Phono Preamplifier Weight 11.5 lbs. (5.2 kg) 

Shipping Weight 16 lbs.