Power Amplification
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Power Amplification
The Meridian G55 is our powerful Five Channel Power Amplifier.
Suitable for a variety of applications the G55 also incorporates a unique bridging system for higher power and flexibility, providing optimum performance with any loudspeaker at any volume level.
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G55
The G55 is an award winning high resolution power amplifier. Derived from the same technology we use in our flagship DSP8000 this high power, ultra-low distortion, wide bandwidth power amplifier can comfortably drive any passive loudspeaker with control, fidelity and authority.
In normal mode, delivers 5 x 100 watts into 8 ohms for use with five loudspeakers. In bridged mode, delivers 2 x >300 watts plus 1 x 100 watts into 8 ohms for driving the front three loudspeakers (left, right and centre). Capable of driving all channels simultaneously.
Features a capacitor-free signal path for fast, accurate bass and a unique ultra-low-feedback design for superb overall sound. Each channel delivers its audio from five pairs of high-powered output devices.
The elegant aluminium, steel and glass case houses five independent amplifier assemblies, each with its own massive internal heatsink. Two huge transformers and 68,000uF of smoothing capacitors ensure amazing instantaneous power is available whenever it is required.
The signal path is balanced throughout - fed from either the XLR balanced inputs or from the "SuperBal" circuitry which converts unbalanced (single-ended) signals to balanced audio as soon as they enter the amplifier.
Features full protection against thermal overload, DC on its inputs and short-circuits on its outputs.
All channels feature two pairs of binding-posts on their output to facilitate bi-wiring of loudspeakers with two sets of connection terminals.
The award winning G-Series high-resolution power amplifiers integrate the same technology we used within the Special Edition range of loudspeakers. The G55 and G57 are high-power, ultra-low distortion, wide bandwidth power amplifiers that can comfortably drive any passive loudspeaker with control, fidelity and authority.
The G55 and G57 are high-power, ultra-low distortion, wide bandwidth power amplifiers that can comfortably drive any passive loudspeaker with control, fidelity and authority
Here you will find a quick overview of the product highlights and features.
Here you will find installation information and operating instructions.
Here you will find a summary of the complete range of Meridian products in one document.
AUDIO INPUTS
Balanced on XLR-3F connectors
Unbalanced phono
AUDIO OUTPUTS
2 output sets per channel, terminal posts
PERFORMANCE
Distortion - less than 0.01% input to output
Signal/Noise -better than –100dB
TRIGGER
Wide voltage-range (5–30V, AC/DC) trigger input for remote standby/on switching
DISPLAY
Power/Fault indicator and per-channel operation LEDs
CONTROLS
Rear-panel power switch; per-channel switches for balanced or single-ended input; Bridge-mode switches on channels 1 and 5
DISPLAY
Power/Fault indicator and per-channel operation LEDs
DIMENSIONS / WEIGHT
HEIGHT: 132mm [5.2in]
WIDTH: 440mm [17.32in]
DEPTH: 350mm [13.78in] plus connectors
WEIGHT: 23kg [51lbs]
PERFORMANCE
Overall distortion typically <0.02% at any frequency or level Frequency response In room within 3dB: 20Hz - over 32kHz
RACK MOUNTING
Kit available from Meridian authorised dealers
POWER
Versions: 100, 110, 115, 220, 230, 240 Vac, 50/60Hz.
Standby 31VA, Idle 58VA, 5 channels driven 748VA
The output impedance is 0.024Ω at 1kHz rising to 0.153Ω at 20kHz.
It can deliver all five channels simultaneously with 100W into 8Ω and 160W into 4Ω.
The two outer pairs of the amplifier channels can be set to bridged mode. The other channel remains as a standard amplifier.
The two bridged-mode amplifiers can deliver 300W into 8Ω and 500W into 4Ω.
The 'Bridge Mode Select' switch should be set to 'On' and the appropriate negative speaker terminals must be connected together as indicated on the back panel and shown on page 13 of the user-guide. This can be done with the bridging-bars supplied with the amplifier or by using short lengths of speaker cable of appropriate thickness.
The main indicator LED goes red and the blue channel LEDs go out showing that the unit is offline. Once the cause of the thermal problem is removed, the amplifier can be reset by power cycling (switching the mains power off then back on again).
The amplifier can be brought out of Standby by applying any DC voltage between 5V and 30V to the trigger input.
Check the 'Bridge Mode Select' switches are set to 'Off'. If either of these switches is inadvertently switched to 'On', not all of the input signals are fed through the amplifier. Instead, an inverted version of the affected channel is fed to the adjacent channel.
Check the 'Unbalanced/Balanced' switches are set appropriately. If set incorrectly, no sound will be produced by the channel(s) concerned.
If the option is available, it is generally advisable to use balanced connections. The science behind balanced connections offers the potential for improved performance by achieving lower levels of noise on the input signal. Even if the sonic difference between the two types of connection is not overly apparent during casual listening tests, it can be reassuring to know that 'best-practice' has been observed.
Yes. The flexibility of Meridian amplifiers means that there are several routes to better sound. Having additional amplifier channels available provides the option of using bridged-mode and/or bi-amping techniques to improve performance across the output channels.