Marshall 20W JTM Valve Combo Amp, Black
Marshall 20W JTM Valve Combo Amp, Black
Marshall 20W JTM Valve Combo Amp, Black
Marshall

Marshall 20W JTM Valve Combo Amp, Black

SKU ST20C
$2,299.99
CAD · Taxes calculated at checkout
Monthly financing available · See options
Available to order – ships within 2-7 business days.
Not in store right now, but in stock at our warehouse.
In stock
Ships across Canada & USA · usually within 2–7 business days
14-day exchange policy · details
Questions? Talk to our staffCallEmail
Quality-checked Every order is checked by our team before it leaves Granata Music.
Fast shipping Most in-stock orders ship within 2–7 business days.
Expert support Setups, repairs and advice from our own in-store team.
Local since 1984 Ottawa’s music store – shop, lessons, studio and rehearsal space.
About this item

Marshall 20W JTM Valve Combo Amp, Black

The amp that started it all is back. The same iconic JTM sound, but more compact packing the power you know and love from Marshall, in a new compact size. The JTM is a welcome addition to the Studio range, offering players authentic, smooth, and valve-driven break-up at lower volumes – perfect for home or studio use. Don’t let its size fool you, the superb allvalve tone of the Studio JTM packs a punch. Creating a sound that defined a generation the JTM delivers the legendary loud blend of crunch and clean recognised the world over.

Like the original 30W head, the Studio JTM is loaded with two ECC83 preamp valves, two 5881 power amp valves and one ECC83 phase splitter, taking you right back to the renaissance of rock’n’roll. The Studio JTM offers the same control and versatility as older models, where simply patching the two channels together opens up a world of all-valve tonal possibility. Power switching enables you to switch effortlessly between 20W and 5W and two loudness controls mean you can play as loud as you like. Features such as a DI out and FX loop have been added, bringing the JTM into the now.

Hand built at our world-class factory in Bletchley, England, the Studio JTM features fingerjointed cabinets, hand-welded chassis, hand-soldered potentiometers and valve bases, and the highest quality componentry. Adorned with period-correct aesthetics from the same metal, red enamel poured “coffin” logo to its fawn fret complete with gold piping and beading, the Studio JTM beautifully nods to the 60s.

  • Power: 20W with power reduction to 5W 2 x ECC83, 1 x ECC83 (phase splitter) and 2 x 5881
  • Valves: Single channel with four separate inputs
  • Channels: High treble and normal loudness controls
  • Equalisation: Treble, middle, bass and presence
  • Speaker outputs: 5 x 1/4” jack sockets (16O load / 8O load / 4O load)
  • Outputs: DI output
  • Speaker config: 1 x 12"
  • Speaker model: Celestion G12M-65 Creamback (16O, 65W)
  • Unit weight: 17.8kg
  • Unit width: 500mm
  • Unit height: 460mm
  • Unit depth: 265mm

Specifications

Compare similar amplifiers
Details
Power
20W with power reduction to 5W 2 x ECC83, 1 x ECC83 (phase splitter) and 2 x 5881
Valves
Single channel with four separate inputs
Channels
High treble and normal loudness controls
Equalisation
Treble, middle, bass and presence
Speaker outputs
5 x 1/4” jack sockets (16O load / 8O load / 4O load)
Outputs
DI output
Speaker config
1 x 12"
Speaker model
Celestion G12M-65 Creamback (16O, 65W)
Unit weight
17.8kg
Unit width
500mm
Unit height
460mm
Unit depth
265mm

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Make it play like yours

Our in-store repair shop can set this up before it leaves – string gauge, action, intonation and tuning, done to how you play. Already own one? Book a setup anytime.

Repairs & setups

New instrument? Take a free trial lesson

Granata Music School teaches guitar, bass, piano, drums, voice and more, right here in the store. Your first lesson is on us.

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Shipping, returns & financing

Shipping Ships across Canada and to the USA. Orders are packed quickly, inspected and shipped with care – most in-stock orders ship within 2–7 business days.Shipping policy
Local pickup Pick up at Granata Music Roydon, 43 Roydon Place, Ottawa. Usually ready in 24 hours – we’ll email you when it’s ready.Hours & directions
Returns & exchanges 14-day exchange policy. See the refund policy for full conditions, including clearance and finish-flaw items.Refund policy
Monthly financing Spread the cost with monthly payments on eligible purchases. Ask our staff about current financing options and terms.Talk to an expert

Questions

Quick answers about buying from Granata Music.

Real people, real advice

Still deciding? Ask our staff.

We play, set up and repair this gear every day. Call or email and we’ll help you choose.

Call 613-727-0727 Email us
Come play it in person

Granata Music Roydon
43 Roydon Place, Unit 4, Ottawa, ON

Mon–Fri 10–8 · Sat 10–7 · Sun 12–5

Get directions
Can I try it in-store before I buy?
Yes. Visit us at 43 Roydon Pl Unit 4, Nepean (across from Costco). Open 7 days: Mon–Fri 10–8, Sat 10–7, Sun 12–5. Call (613) 727-0727 to make sure it's on the floor.
Do you price match?
Yes. We'll match the verified price of any product from an authorized retailer in Canada. Call or message us with the listing.
Do you ship, or can I pick it up?
We ship across Canada and the U.S. by UPS, Canpar or Canada Post. Cost and delivery estimate show at checkout. Local? Choose ‘Pick Up’ at checkout to collect it in Nepean at no shipping charge.
What payment methods do you accept?
Visa, Mastercard and American Express online, or call (613) 727-0727 to order by phone with Visa or Mastercard.
What's your return policy?
Regular-priced items can be exchanged within 14 days at no charge, or returned within 7 days for a refund to your original payment method, less a 5% restocking fee. Please bring your receipt and the original packaging. Boxed gear can be opened to check it out, but must come back unused, undamaged and complete for a refund. Sale and clearance items, and anything bought with a discount code, are final sale.

Price match

Found a better price?

We make every effort to match prices from authorized Canadian retailers. Share the competitor's listing for this item and our team will review it.

Prefer to speak with someone? Call 613-727-0727 or visit us at 43 Roydon Pl, Unit 4, Nepean.

Why buy from Granata

The Granata advantage.

Ottawa's family-owned music store since 1984. Instruments, lessons, repairs and a recording studio under one roof, with a knowledgeable team to support you before and after your purchase.

1984Family-run since
4.8★Average Google rating
395Google reviews
7 daysOpen 7 days a week

Our promises

7-day refunds

Most regular-priced items are eligible for a refund within 7 days, issued to the original payment method.

5% restocking fee applies · Receipt and original packaging required
14-day exchanges

Regular-priced items may be exchanged within 14 days at no charge.

Some items are exchange-only or final sale. See return details.
Price match

We make every effort to match prices from authorized Canadian retailers.

Try before you commit

Boxed items such as amplifiers, pedals and keyboards may be opened for inspection.

Must be returned unused and complete to qualify for a refund.

Buying with us

Expert adviceOur team can help you choose the right instrument or accessory in store.
Monthly paymentsFlexible monthly payment options are available at checkout.
Special ordersItem not in stock? Many special-order items arrive within 2–7 business days.
Holds & reservationsContact us to reserve or hold an item, where possible.
Wide selectionGuitars, basses, keyboards, drums, amplifiers, sheet music and accessories.
Prices in CADAll prices are in Canadian dollars. Taxes are calculated at checkout.

Getting it home

In-store pickupOrder online and pick up in store. We're located across from Costco, with parking right outside.
Ships across CanadaShipping rates are calculated at checkout based on size, weight and destination.
Open 7 days a weekMonday to Friday 10 am–8 pm, Saturday 10 am–7 pm, Sunday 12–5 pm.

Service after the sale

In-house repairsRepairs and setups are completed on site. An estimate is provided when your instrument is checked in.
Lessons under one roofGuitar, piano, voice, drums, bass, violin and more. Your first trial lesson is free.
Studio & rehearsal roomsBook recording time at Granata Studios or rent a rehearsal room by the hour.

Community

Family-run since 1984Founded by Nello Granata and run by his son, Gino, since 2008.
4.8★ on GoogleRated 4.8 out of 5 across 395 Google reviews.
Open mic nightsWe host open mic nights in store. Visit our blog for upcoming dates.
Call 613-727-0727 Get directions Our story

Returns & exchanges

Changed your mind?

Regular-priced items may be exchanged within 14 days, and most are eligible for a refund within 7 days.

  • 14-day exchanges: Regular-priced items may be exchanged within 14 days at no charge.
  • 7-day refunds: Most regular-priced items are eligible for a refund within 7 days, issued to the original payment method. A 5% restocking fee applies. Please provide your receipt and the original packaging.
  • Boxed items: Items such as amplifiers, pedals and keyboards may be opened for inspection. To qualify for a refund, they must be returned unused, undamaged and complete in the original box.
  • Exchange only: Books, sheet music, opened packaged accessories and any item that comes into contact with the mouth are eligible for exchange only.
  • Non-returnable: For hygiene reasons, drums, humidifiers, strings, cymbals, reeds, and brass and woodwind instruments cannot be refunded or exchanged.
  • Final sale: Sale and clearance items, and items purchased with a discount code, are final sale and cannot be refunded or exchanged.
  • Shipping: Shipping charges are non-refundable.
View the full refund policy →