LDR Preamplifier

Light Dependent Resistor (LDR) Preamplifier with Virtual Battery

The Angle Audio LDR Preamplifier is a very high quality, flexible preamplifier at an amazing price.

Our LDR preamp is a passive preamplifier with no mechanical resistive wipers in the audio path. This ensures that the audio signal is pure and unadulterated yet the LDRs still allow fine control of the signal level via the front panel volume control.

The preamplifier comes with two inputs, one of which is a phono stage input, the other input is a line level input. The phono stage included in the unit is our excellent Audiophile+ unit but this can be upgraded to our new discrete phono stage if you wish, both types will support either MM or MC cartridges (MM and MC support is an option).

This unit also comes with our new Virtual Battery 3 functionality that provides a very high capacity internal rechargeable battery that powers the unit. With VB 3 the unit detects when the battery is getting low and automatically switches to mains power so you can keep on enjoying your music. (If you don't require VB functionality then please let us know when you order).

As with all our equipment we only sell directly to you so you have no retailer margins to pay, that’s one of the reasons other manufacturers just can’t match our features and benefits at these prices. This unit benefits from extensive power filtering, very high quality components and the availability of a number of custom features.

Our LDR Preamplifier continues our tradition of putting sound quality first, it’s a very high quality unit, designed and laid out to maximise audio performance and utilising quality components throughout.

ALL Angle Audio equipment is designed and built in the UK.

Options available with this unit include:

- Dual inputs, line level, or dual input, one via phone stage.
- Discrete phono stage.
- MM/MC switching
- Load Plugs
- Mono switch (not with MM/MC switching)
- Virtual battery power supply - standard
- Amplified/buffered output

Technical Specifications:

- LDR Preamplifier: No resistive wipers in audio path, Max Attenuation >120dB.
- Phono stage features: Very low noise amps, Panasonic power caps, quality all aluminium case, quality earth post, Power scheme optimised for audio quality, includes DC power supply. Unit includes a power-on indication LED on front panel. Rear of unit has power input, gold plated phono left/right inputs/outputs and an earth post.

MM/HMC

Nominal Input sensitivity: 3 mV rms
Input range: 1.5mV - 35mV
Input resistance: 47k & 100pF
Maximum input: 35 mV rms
Nominal output: 600 mV rms
Gain: 46 dB (200)
Noise (ein) 0.136uV
Distortion: 0.01%
RIAA accuracy:  <0.5 dB
Channel separation: 82 dB
Technology: 1% Metal Film Resistors
Quality Film Capacitors
Panasonic Power Caps

MC

Nominal Input sensitivity: 0.3 mV rms
Input range: 0.15mV - 2mV
Input resistance: 470R & 100pF
Maximum input: 3.5 mV rms
Nominal output: 363 mV rms
Gain: 61 dB (1122)
Noise (ein) 0.136uV
Distortion: 0.01%
RIAA accuracy: <0.5 dB
Channel separation: 82 dB
Technology: 1% Metal Film Resistors
Quality Film Capacitors
Panasonic Power Caps

Rear Panel:

Click on the image below to view a larger version.

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Front Panel:

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angle-audio-ldr-amplifier-back-1