User Manual

counter-clockwise. VOLUME sets the output level for its channel
only.
6. Channel Select Switch – DT25 features two independent
channels, A & B.When settoA,usethe (5A)controls.ForB use
the (5B) controls. You can assign unique combinations of Voicing/
Feedback Topology, Amplier Operating Class and Pentode/
Triode settings for each channel. This provides much more than the
traditionalclean/dirtychannelconguration.Eitherchannelcanbeset
upanywayyoulike…evenidentically,ifthat’swhatyou’relookingfor.
Customizationofeachchannelisnotlimitedtosimplychangingsome
components of the preamp or tone stack - the entire power section
canberecongured and switched instantlytoo. It’slikehaving two
extremely versatile tube amps in one box!
7. Voicing Switch – This switch determines the flavor of the currently
selected channel’s preamp and tone stack, as well as the Negative
Feedback Loop topology (NFL).  NFL has a big impact on tonal
characteristics and the overall “feel” of the amp. Flip the switch up or
downtotogglethroughsettingsIthroughIV.Withasingleswitchyour
tonecangofromcleantomean.Eachvoicingisdistinct:
I – PutstheNFLinitstightestsettingwhileconguringtheChannel
Control’sbehaviorreminiscentofthegreatAmerican“Blackface”
ampsofthe60’s.
II – Sets the NFL topology to be a little looser than I while the
Channel Control settings are capable of dialing in echoes of
classic British amps.
III – ThisistheZeroNegativeFeedbackLoopsettingwhichproducesa
very “open” or “dynamic” feeling amp. In this setting, the Channel
Controlsareconguredforversatility with a distinct“chime-y”
quality.
IV – Setting IV brings the NFL back in and adds a low frequency
resonance that pairs quite well with high gain voicing applied to
the Channel Controls.
8. Class A / Class AB Switch – Class A operation is more dynamic
with greater touch sensitivity. Use Class AB operation for greater
headroom and power. In addition to setting the operating class, this
switch also determines the wattage and bias type:
 Whensetto Class A theamp is runningat 10 Watts andcathode
biased.WhensettoClass ABtheampisrunningat25Wattsandxed
biased.
Try both settings with each voicing to see what sounds best to you.
9. Pentode / Triode Switch – Thisswitchchangestheconguration
of the power tubes. Set switch to Pentode to sound clear and
commanding. Triode sounds quieter and rounder with a more vintage
feel.
rear Panel Controls & ConneCtions
10. Power Cord Receptacle – Plug the included power cable here.
11. Speaker Outs – Connect speakers here using speaker cables only.
You should only use one output (A, B, or C) at a time and never power
theamplierupwithoutspeakersconnected.Ifyouwanttosilencethe
speakers,usetheStandbyswitch.Thedetailsareasfollows:
Output A isfora4-ohmspeakerload.Youcaneitherhookupone
4-ohmspeaker/cabortwo8-ohmspeakers/cabs
Output Bisforan8-ohmspeakerload.Youcaneitherhookupone
8-ohmspeaker/cabortwo16-ohmspeakers/cabs.
Output Cisforasingle16-ohmspeakerload.
12. Cabinet Simulated Direct Out – Provides a transformer-tapped
direct output with cabinet simulation for studio recording or live
performancewithoutmic’ingyouramplier.Thegroundliftswitchcan
beusedtoeliminatehumorbuzz.
13. Serial Effect Loop – Usetheeffectlooptosendyouraudiosignalto
external effects processors and stomp boxes such as modulations, delays
& reverbs. Note:Signalpathis inseries.WhenusingtheSEND,
audio will not pass through to the poweramp without a connection
back to the RETURN.