Soundstream Technologies Class A 10.0, Class A 5.0 owner manual LSE.Q Theory and USE Class a

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0 -5-10-15-20-25

LSE.Q THEORY AND USE (Class A 10.0)

 

LSE.Q is a unique subwoofer control circuit

 

included

with

the

SOUNDSTREAM

 

REFERENCE Class A 10.0 amplifier.

It is

 

capable of removing subsonic energy in program

 

material. The circuit consists of two controls.

 

One adjusts the frequency of operation and the

 

other adjusts the range of boost. With both

FIG. 1 LSE.Q

controls adjusted

fully counter-clockwise, no

boost is

applied

and the

amplifier is

flat in

response down to 30 Hz.

The frequency control (Hz) adjusts the starting point of the subsonic

filter. This

high pass filter can be

10

Q=2.8

 

 

 

adjusted from 30

Hz

up to a

5

 

 

 

maximum of 60 Hz. This control

0

 

 

 

 

-5

 

 

 

 

 

 

 

 

 

 

 

 

is useful for setting the lowest dB -10

 

Q=0.707

 

 

frequency that your subwoofer will

-15

 

 

 

 

see. (See figure 1)

 

 

-20

 

 

 

 

 

 

 

 

 

 

 

The Q control adjusts the

-25

 

 

 

 

-3010

Frequency (Hz)

50

100

200

amount of boost applied at the set

 

FIG. 2 Variable “Q”

 

 

frequency.

This

is

adjustable

 

 

 

 

 

 

 

 

from .707

(flat) to

2.8 (+9 dB).

10

 

 

 

 

(See figure 2)

 

 

5

 

 

 

 

 

 

 

 

 

 

 

When the Q is set to .707 dB (Butterworth), LSE.Q acts as a sub-sonic filter only. (See figure 3)

The simple

act

of removing the -30

 

 

 

 

 

 

10

Frequency (Hz)

50

100

200

signal below the vented tuning

FIG. 3 Variable High Pass

 

 

frequency

can

improve system

 

 

 

 

 

output by as much as 3 dB. With Q values greater than .707, boost is

10

 

 

 

added to

the sub-sonic filter. (see

 

 

 

figure 4)

 

5

 

 

 

 

0

 

 

 

Application

-5

 

 

 

dB

 

 

 

Woofers in vented enclosures have

-10

 

 

 

-15

 

 

 

good power handling characteristics

-20

 

 

 

 

 

 

above the tuning frequency, but

-25

 

 

 

-3010

Frequency (Hz)

50

100

200 below the tuning frequency, power

 

FIG. 4 Variable “Q”

handling

drops off considerably.

 

 

 

most amplifiers in the Class A 5.0, and over twelve times in the Class A 10.0! More drive current maintains the amplifiers' performance into low impedance loads.

Drive DelayTM Muted Turn-on/off Circuit - A unique circuit which completely eliminates any amplifier-relatedturn-on/off noises.

Flexible Dual Input Level Sensitivity accepts 2 voltage ranges; from 200 mV to 2.0 V and from 500 mV to 5.0 V, permitting maximum output from the amplifier with virtually any source unit.

Differential Balanced Input Design for added immunity to noise caused by component and vehicle electrical system interaction when using Unbalanced RCA inputs.

True Balanced Input for professional-quality performance and noise cancellation. The 6-pin din plug carries (+) and (-) Signal information for Left and Right channels, audio ground, and ±15 Vdc to operate the Soundstream BLT Balanced Line Transmitter.

AIRBASS™ ACCESSORY OPTION

Soundstream's newAIRBASS™ feature can be added to the REFERENCE Class A amplifiers. This feature allows wireless RF remote control level adjustment of the amplifier.

NOTE: The AIRBASS™ accessory is intended to be used only while the REFERENCE Class A amplifiers are driving subwoofers. When the AIRBASSaccessory is added to a REFERENCE Class A amplifier, it automatically configures the amplifier into Bridged Mono mode. (The Coherent Stereo / Mixed Mono / Bridged Mono switch is bypassed.) Therefore, when using AIRBASS™, follow the Bridged Mono input and output wiring

Installing AIRBASS™ involves removing the bottom plate of the amplifier, adding the AIRBASS™ circuit board, and flipping a switch. The switch is labeled on the amplifier's main circuit board. DO NOT set theAIRBASS™ switch to the "IN" position unless the AIRBASS™ module has been added. DO NOT move the AIRBASS™ switch while the amplifier is "ON". Doing so may damage your speakers. (Please refer to the AIRBASS™ owner's / installation manual for more details.)

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Contents Reference Series and Parallel WiringCongratulations ServiceSpecifications Protection Circuitry TroubleshootingTable of Contents LSE.Q Theory and USE LSE.Q Theory and USE Class a Level Setting Installation StepAmplifier Location Installation and MountingSignal Cable Wiring DiagramRemote TURN-ON Speaker CableCircuit BREAKERS/FUSES WiringPower and Ground Balanced / Unbalanced Input Coherent Stereo MIXED-MONO / Bridged Mono

Class A 10.0, Class A 5.0 specifications

Soundstream Technologies has established itself as a frontrunner in the field of high-fidelity audio equipment with its innovative Class A amplifiers, most notably the Class A 10.0 and Class A 5.0. These amplifiers exemplify their commitment to superior sound quality and advanced engineering.

The Class A 10.0 amplifier is designed for audiophiles seeking unparalleled audio performance. It boasts a remarkable power output of 100 watts per channel, ensuring that even the most demanding speakers can be driven effortlessly. One of the standout features of the Class A 10.0 is its true Class A operation, meaning it operates at all times in the Class A range, delivering a warm and rich sound signature. This type of operation reduces distortion significantly, allowing for a more authentic reproduction of audio across various frequencies.

In contrast, the Class A 5.0 amplifier caters to smaller setups without compromising on sound fidelity. With an output of 50 watts per channel, it is ideally suited for compact systems or near-field monitoring applications. Despite its smaller size, the Class A 5.0 still utilizes Class A circuitry, promising a similarly lush audio experience.

Both models integrate innovative technologies to enhance performance. They utilize high-quality components, including carefully-selected capacitors and low-noise transistors, which contribute to the amplifiers' exceptional sound clarity. The advanced thermal management system ensures that these amplifiers maintain optimal operating temperatures, enhancing reliability and durability during extended listening sessions.

Additionally, the integrated power supply in both amplifiers is designed to minimize voltage fluctuations, further refining audio output. This feature is crucial for preserving the integrity of the sound, especially during peaks in musical dynamics. Each model also features a fully balanced input, which significantly reduces noise interference from external sources.

In summary, the Soundstream Technologies Class A 10.0 and Class A 5.0 amplifiers are perfect embodiments of the brand's dedication to delivering exceptional audio performance. With their Class A operation, powerful outputs, and advanced technological features, these amplifiers stand out in a competitive market, appealing to audiophiles and casual listeners alike. Whether for a home theater system or a studio setup, these amplifiers guarantee a superior listening experience characterized by clarity, warmth, and minimal distortion.