Ashdown CTM-30 Little Stubby User Manual
- June 9, 2024
- Ashdown
Table of Contents
Ashdown CTM-30 Little Stubby
THANK YOU
Thank you for purchasing your Ashdown Engineering Amplifier and welcome to the
family! We really think you’ve made the right choice and know that this
amplifier will give you years of great tone and service.
It is a machine though and needs to be looked after, please read through this
user manual which will help you get the most out of your new Amp and keep it
running as long as some of our
happiest and very famous customers.
REGISTER ONLINE
Please register this product online so we can make sure we give you years of
customer support through our friendly in-house service centre.
Here is where you need to visit to register your product:
http://www.ashdownmusic.com/pages/register-your-product
Weight – 12Kgs – 26lbs
Instrument Input
There is one instrument input, with a Sensitivity switch. The high sensitivity
toggle is a high impedance toggle to suit passive bass instruments. The Low
sensitivity toggle has an impedance to accurately match the signal from active
bass instruments i.e. Those with a built in battery powered pre-amp.
Drive
This works as a gain control from crystal clear tones through to full bore
rich harmonic distortion… A little can go a long way…
Feedback
The feedback control alters the slope of the lower frequencies in the bass
control section.
Bass, Middle & Treble Passive EQ
This consists of bass, middle and treble controls with a vastly enhanced range
of over 40dB at full output.
Volume
The output control adjusts the overall level of the amplifier. Adjust this for
your preferred overall stage playing volume.
VU Meter
The VU meter provided on the front panel gives you a a visual dispaly of
output of the amp as its being played. This can be used to ensure clean
headroom or for something a little more agressive….
Effects send/return
A tube driven and recovered effects loop is provided, this is situated be-
tween the preamplifier and power amplifier ahead of the master volume, The
signal level is suitable for driving a wide range of effects pedals , the
level present being entirely dependent on the level of pre gain being used.
Only effects should be used in this loop.
D.I.
A DI is provided on the rear panel , connection is made via a TRS type jack
socket .This is transformer derived from the output and as such
will have all the adjustments made with the tone controls , all effects in use
and some influence from the speaker in use. The level obtained is dependent on
playing volume. But as a general rule is suitable for line level (0,775V).
The DI is totally isolated and as such may be used as a line out ( note a TRS jack MUST be used and you can obtain an in phase or out of phase signal) Note That the amplifier must always have a Load connected. This can be a speaker or a load box for silent recording.
Speaker Outputs
Two speaker output sockets are provided at an impedance of 8 or 4 ohms only
ONE must be used at any one time , the socket being chosen to match the
impedance of the cabinet combination in use at the time.
Note That the amplifier MUST ALWAYS have a Load connected. This can be a
speaker or a load box for silent recording.
MAINS
The amplifier is fitted with a standard IEC connector and supplied IEC lead
correct for the country in which you reside.
The Preset input VOLTAGE is shown on the rear panel together with fuse
ratings.
WARNING! This product has been manufactured according to specific
specifications with regard to supply voltage requirements that are applicable
to the country in which it is intended that this product be used.
If you have purchased this product via the internet or mail order you must
verify that this product is intended to be used in the country in which you
reside.
The use of this product in any other country other than that for which it is
intended could be dangerous and invalidate the manufactures warranty.
Inputs
High sens Nominal 100mV @1Mohms Impedance (Suitable for passive instruments)
Low sens Nominal 300mV @ 22k impedance (suitable for Active instruments)
Effects Loop
Valve driven effects loop, Valve recovered Nominal 225mV
DI Output
Transformer generated signal from the amplifier output level dependant on
playing volume suitable for connection @ line level via TRS jack to XLR.
ISOLATED GROUND
Equalisation
Totally PASSIVE eq circuit Bass , Middle and Treble controls , Range Zero to
full output on all 3 bands ( dependant on volume setting ).
Feedback control alters the slope of the lower bass filters and affects the
extension of the lower bass frequencies.
Power Amplifier
All Valve design featuring a fully floating paraphrase inverter, 4 x EL84
power tubes with individual self biasing, and Zero negative feedback for a
self limiting open loop response and a good sensitivity to the speakers in
use.
Output power 30 watts continuous average into 4 or 8 ohms.
Valve complement:
- 1 x ECC81
- 1 X ECC82
- 2 x ECC83
- 4 X EL84