Stones Sound Studio S200W-V2 Manuel utilisateur

STONES SOUND STUDIO S200W-V2 INS 14-2013.doc

STONES S200W-V2

USER MANUAL

Subwoofer Amplifier

with

TWIN A-V FILTER CURVES

STONES - S200W-V2

Installation and Operation Instructions

By Russell Storey

FEATURES

 SSS NEW upgraded STONES S200W-V2 Amplifier

 Excellent for low impedance sub driver loads single or twin 10" 12" 15" subwoofers.

 Speaker sockets with high level in

 Very stable under all loads

 TWIN A-V FILTER CURVES

 Heavy duty speaker cable

 Gold plated RCA low level inputs

 180/0 degrees phase switch.

 Power / auto On switch

 Manual control of Volume (Level) and Frequency

 Green LED Position Indicators and Power On indicator

 Improved signal to noise

 Dynamic range

 Bass transit speed

OVERVIEW

Thank you for purchasing the 200 Watt Subwoofer Amplifier. Ideal for building subwoofer projects for

audio and home theatre systems. This amplifier includes both high and low level inputs, phase switch, auto

on/off (activated by input signal) and a handy control that adjusts the volume level and a unique (Audio

and Video) switch selector that enables the electronic twin low pass filters to vary the low pass cut off

slope and frequency. When switched to Audio (used for Music Blu-ray, DVD and 2 channel systems) the sub

amplifier goes flat to 5HZ .With the switch set to Video position there is a filter at 35 HZ to reduce

subwoofer cone excursion in the 0 to 17 Hz region but this, in conjunction with the frequency control still

enables excellent Home Theatre LFE effects and tight bass.

The amplifier sums the right and left stereo inputs to a mono output, so that only one amp is required per

system. It also features a 12dB high pass filter (125Hz, 8ohm) output for satellite speakers if need be.

The amp has thermal overload and fuse protection for years of reliable use

STONES - S200W-V2

QUICK SETUP

CONTROLS & RECOMMENDED SETTINGS

1. PWR/PRT SET SWITCH TO “ON” (OFF / AUTO /ON/)

2. LEVEL (GAIN) SET TO “9 O’clock ”

3. FREQ ( Frequency) SET TO “9 O’clock

4. PHASE SET SWITCH TO “REV” ( REV /NOR )

5. AUDIO /VIDEO SET SWITCH TO “AUDIO”

6. LOW LEVEL IN

Connect an RCA ( Y ) cable (*see page 9) to connect both the Left and Right Channel inputs together

to the input of the subwoofer amplifier then connect the other end of the cable to the Home

Theatre receiver “SUB OUT” .

7. PWR/PRT -- POWER SWITCH (OFF / AUTO /ON/)

When the power switch is in the auto on position, the amplifier will automatically turn on when a

signal is present. Note: In auto on/off mode

Russell‘s Tip 1

A/ I recommend that you leave the (OFF / AUTO /ON/) switch in the (ON) position and turn the

subwoofer power On and Off at the wall outlet when not in use. Do not leave the subwoofer or equipment

on and then go out or on holidays.

Why? This prevents main grid power surges and high voltage spikes from storms etc turning the subwoofer

unit on and off at random.

B / Power 240 V to System

If running on a 240V generator or Solar power or using Grid power in rural areas always disconnect the

mains power plugs at the wall socket or power outlet when not using the subwoofer or your Home Theatre

TV sound system. This will prevent damage to the equipment from power brown outs, voltage surges,

lightning and storm damage.

STONES - S200W-V2

(LEVEL) CONTROL - volume

Adjusts the output level of the Subwoofer Amplifier.

Russell‘s Tip 1: For LEVEL

#### Warning #### Don’t set the volume past 12 O’clock with the Level Control. This amp is a deceivingly

powerful amplifier and can and will damage some subwoofer drivers. If you don’t have enough level from

the sub amp it’s the HT amplifier or integrated amplifier line signal level out is not high enough to drive the

STONES 200 Watt Subwoofer Amplifier set the levels in the HT Menu >> see below .

NB For best sound quality I recommend connecting with the High level speaker inputs to the sub amplifier.

See Instructions below: -

Russell‘s Tip 2 (LEVEL) CONTROL - Volume

NB. Warning

With home theatre movies & sound effects, levels are recorded all over the place. On DVD & Blu ray it is

possible to blow up a subwoofer speaker If you have the volume or freq set to high on some movies or

music CD’s, Blu-ray & DVD’s.

I recommend that you initially leave the LEVEL setting at 9 o’clock until you get the feel of the Subwoofer

with movies over a period of a few weeks.

Pre-set your HT receiver Menu SUBWOOFER level to lower to all the other channels L, C, R and rear effects

channels to begin with.

If you have a DTS and Dolby LFE effects level setting in the HT menu set this to Max. Remember to turn the

Subwoofer On in the Speaker Settings... Some HT receiver’s auto turns the SUB off after powering On/Off

FREQUENCY CONTROL

Continuously variable from 15Hz to 150Hz at 24 dB/Octave LF and 12db HF

Russell‘s Tip 2:

Set the Frequency control to 9 o’clock and leave it there always...

Some types of music may need ¼ of a turn more but always reset the control to 9 0’clock after use.

## Why? Based on my experience with AV systems this will enable the best quality bass on any kind of

music and HT sound effects.

Setting the Frequency Control to 9 O’clock also reduces room modes (bass boom) in most room shapes

and tightens the bass. Setting the Frequency Control past 12 o’clock position can and will create room

modes (bass boom) in most room shapes and enable honky hollow bass sound.

STONES - S200W-V2

PHASE SWITCH Selectable between 0° and 180°. This will aid in subwoofer room placement.

Russell‘s Tip 3: PHASE

The correct position will be the one that provides the most apparent/loudest bass output level and

provides fast tight bass.

Set Phase switch to REV “” Reverse

## In the Home Theater Receiver Menu Turn OFF (Centre and Rear Effect speakers) and set up the

Subwoofer phase with the front left and right speakers running ONLY

Then Play back a CD or DVD with a fast tight bass guitar and switch the phase switch back and forth whilst

listening to the music at your normal listening position

Get a friend to switch the phase switch for you whilst listening at your normal position (lounge chair) or

you can sit on top of the subwoofer box and switch it yourself whilst looking at the Front speaker. With the

grills off you will see the speaker cones move in sync with the Subwoofer cone and the sound quality

improve in one or the other phase switch positions.

STONES - S200W-V2

STONES S200W-V2 200W Subwoofer Amplifier - Audio and Video Filter curves

STONES - S200W-V2

HUM & NOISE Home Theatre or 2 Channel Amplifier

As we have a mixture of different earth points around the house via TV antennas, satellite dishes, Foxtel,

set top boxes etc. and also combine this with the use of 2 pin (no earth) and 3 pin (earth) equipment in our

systems, sometimes a low or high level 50 Hz hum comes out through the subwoofer or main L&R

speakers.

SOLUTION :

Locating what is creating the earth loops or hum in your sound system can be a very time consuming,

frustrating and expensive even for expert technicians with a plethora of recommended techniques and

gadgets. On my own Home Theatre Sound System I hook up All my equipment (TV, Satellite, Home Theatre

amplifier, DVD, Blu-ray, CD player, computer etc.) via one protected multi power outlet board) from a

single 240V power outlet socket on the wall.

Between the 240V wall socket and the protected multi power outlet board, I insert (in series) a 240V to

240V 250 Watt Isolation Transformer. Bingo! This works!! Another benefit is you only have one switch on

the wall to turn off all the equipment after use and if there is a bad storm or lightning about you can

quickly pull the plug out of the wall to protect all your equipment in one go.

ROOM LOCATION AND SUBWOOFER HEIGHT ABOVE THE FLOOR

Russell‘s Tip 4:

Subwoofer needs to be 450mm out from the rear and adjacent side walls to enable tight bass.

Always keep the subwoofer away from the corner of a room; the corner of the room will increase the bass

but cause poor quality bass and Bass-Boom (LF room modes)!!

Experiment with Sub height above floor < forget the feet on the box >. Try sitting the Subwoofer box up on

top of a 60 to 70 mm thick phone book. This will tighten the bass and reduce room modes and boom

dramatically!! You can make your own DIY Centre Stand for the subwoofer. I recommend you fill the inside

cavity if there is one with lead and fit this to a 12mm thick rubber on the base.

STONES - S200W-V2

STONES Recommended HT and Subwoofer Room location V2 2010

STONES - S200W-V2

Input/Outputs

LOW LEVEL IN:

These are line level RCA inputs used to connect from the Home Theatre (Sub out), RCA line out OR pre-

amplifier outputs to the LOW LEVEL INPUTS on the S200W V2 Subwoofer Amplifier.

Russell‘s Tip: Use an RCA (Y) cable to connect both the Left and Right Channel inputs together.

Why? This gives a 6db level boost to the input of the Subwoofer Amplifier. The cable can be up to 5M long

LOW LEVEL OUT:

This line level RCA output provides a full range (20Hz-20kHz) output and is used to connect “daisy chain”

the line level signal to other amplifiers.

Note: LOW LEVEL OUT is only active when a signal is present at the low-level input.

STONES - S200W-V2

SUBWOOFER SPEAKER CONNECTIONS:

Connect the Subwoofer speaker to the Subwoofer amplifier using the supplied speaker cable with push on

speaker connectors marked speaker negative (-) and positive (+).

Russell‘s Tip: Solder speaker leads to Subwoofer Speaker as this enables most reliable connection

compared to push on connectors which can vibrate loose with very low frequencies inside the cabinet.

SUB AMPLIFIER SPEAKER LOAD (2, 4 or 8 ohm)

Russell‘s Tip: Subwoofer Speaker Impedance (DC or AC)

Some makes/brands of subwoofer drivers (specified at 4 Ohms Nominal) voice coil resistance can and

does go below 2ohms (DC or AC) especially “dual voice” coil types or when 2 x subwoofer drivers are

wired in parallel.

The subwoofer driver and configuration of wiring above needs a special amplifier that will drive 2 ohm

loads.

NB. This amplifier is not designed to drive 2 Ohm loads.

SUBWOOFER AMPLIFIER ( Cut-out Hole and screw size) = 217 x 217 mm

Russell‘s Tip:

Some amplifier modules vary in hole cut out size.

Measure amplifier sealing edge. e.g. Say it’s 17mm wide (subtract this from the outside Height &Depth)

to get the hole cut out size. Cut a sample hole in a piece of scrap timber to test best fit before you cut the

hole in the sub box and say Ooops!!!!!!!!!! Wrong size

I recommend rebating the sub enclosure with a router so the amplifier plate sits flush with the cabinet.

This provides a better look and seal.

NB. User Option Use of long chipboard screws to secure the amplifier to the subwoofer enclosure will

minimize air leaks around the gasket

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