01 · Source
9 documented inputs
¼-inch TS + ¼-inch TRS
- Arrives as
- 9 documented inputs
- Connector
- ¼-inch TS + ¼-inch TRS
- Signal
- analog audio
Mic Preamp
Focusrite ISA Two
Focusrite ISA Two 2-channel Microphone Preamp. Plan its source-defined physical connections and placement in your rig.
- Documented outputs
- 44 destination connections
- Documented inputs
- 9Based on documented inputs
- Rack space
- 1UBuilder checks available rail space
- Power draw
- 35WDocumented typical draw
- Catalog estimate
- ~$999.99Use retailer rows for current price and stock
01 · What it does—and what that changes in your rig.
Product overview
Start with the payoff, then work through how it functions, where it fits, and the details that change a real build.
The payoff
Mic Preamp decisions, organized around the whole rig.
Focusrite ISA Two 2-channel Microphone PreampThe gain stage that lifts a mic’s tiny signal up to line level — the first thing a signal hits, and a big part of how a console sounds.. Plan its source-defined physical connections and placement in your rig.
- Documented outputs
- 44 destination connections
- Documented inputs
- 9Based on documented inputs
- Rack space
- 1UBuilder checks available rail space
02 · Know the whole path before you buy.
Signal path
Learn the route as a block diagram: source, product function, transport, and destination. Select any block to see what enters, what changes, and what leaves.
Interactive block diagramAuto-looping · hover, focus, or tap to hold a stage
Port-type signalProduct functionSystem boundary
Follow one signal from source to destination
01 · Source · selectedEach block answers the same three questions: what arrives, what changes here, and what leaves.
03 · What this product asks of the rest of the system.
Compatibility
Treat connector names as the start of the check—not the answer. These are the boundaries that determine a complete working path.
Best fit · Mic Preamp
Use it when 1U and 325 mm of depth fit the case.
Plan the companion path
Complete the path with upstream and downstream gear that matches connector, direction, signal type, protocol, and wiring standard.
Connector boundary
Documented connectors: ¼-inch TS, XLR male, ¼-inch TRS, XLR female. Match connector, direction, and signal type—not shape alone.
04 · Every connector, grouped by job.
I/O ports
Switch the product view and the documented port inventory updates with it—hardware and data stay side by side.
Every connector, grouped by job.
Switch panels to keep the hardware view and the documented port list in sync.
| Port | Panel | Connector | Direction | Signal | Channels |
|---|---|---|---|---|---|
| INSTRUMENT INPUT 1 · UNBALANCED TS | front | ¼-inch TS | input | analog audio | — |
| INSTRUMENT INPUT 2 · UNBALANCED TS | front | ¼-inch TS | input | analog audio | — |
| CHANNEL 2 OUTPUT · XLR3 MALE | rear | XLR male | output | analog audio | — |
| CHANNEL 2 INSERT SEND · BALANCED TRS | rear | ¼-inch TRS | output | analog audio | — |
| CHANNEL 2 INSERT RETURN · BALANCED TRS | rear | ¼-inch TRS | input | analog audio | — |
| CHANNEL 2 LINE INPUT · BALANCED TRS | rear | ¼-inch TRS | input | analog audio | — |
| CHANNEL 2 MIC INPUT · XLR3 FEMALE | rear | XLR female | input | analog audio | — |
| CHANNEL 1 OUTPUT · XLR3 MALE | rear | XLR male | output | analog audio | — |
| CHANNEL 1 INSERT SEND · BALANCED TRS | rear | ¼-inch TRS | output | analog audio | — |
| CHANNEL 1 INSERT RETURN · BALANCED TRS | rear | ¼-inch TRS | input | analog audio | — |
| CHANNEL 1 LINE INPUT · BALANCED TRS | rear | ¼-inch TRS | input | analog audio | — |
| CHANNEL 1 MIC INPUT · XLR3 FEMALE | rear | XLR female | input | analog audio | — |
| AC MAINS INPUT · IEC | rear | IEC C14 | input | power | — |
Showing 13 of 13 documented physical ports. Scroll to review the remaining rows.
05 · Compare the decision, not just the price.
Alternatives
The rows are organized around fit, power, I/O, and system role so a cheaper unit cannot hide a more expensive workflow.
| Compare | ||||
|---|---|---|---|---|
| Fit | 📐 1U | 📐 1U | 📐 1U | 📐 3U |
| Power | ⚡ 35W | ⚡ 18W | ⚡ 16W | ⚡ 120W |
| Weight | ⚖️ 8.2 lb | ⚖️ 9.9 lb | ⚖️ 9.3 lb | ⚖️ 14.0 lb |
| I/O | 🔌 13 | 🔌 5 | 🔌 5 | 🔌 51 |
| Estimate | 💵 ~$999.99 | 💵 ~$1,995 | 💵 ~$1,495 | 💵 ~$999 |
| Deep dive | Current selection | Full comparison → | Full comparison → | Full comparison → |
06 · Resolve the questions that can change the purchase or build plan.
Planning questions
Short, source-backed answers surface rack fit, power, cabling, and connection details before they become surprises.
How will the Focusrite ISA Two affect rack fit and case depth?
It occupies 1U. Its documented depth is 325 mm.
How much power does the Focusrite ISA Two draw?
Typical draw is 35W and documented maximum draw is 0W.
What connections does the Focusrite ISA Two have?
13 documented physical ports, including INSTRUMENT INPUT 1 · UNBALANCED TS, INSTRUMENT INPUT 2 · UNBALANCED TS, CHANNEL 2 OUTPUT · XLR3 MALE, CHANNEL 2 INSERT SEND · BALANCED TRS, CHANNEL 2 INSERT RETURN · BALANCED TRS, CHANNEL 2 LINE INPUT · BALANCED TRS.
07 · See this unit inside a real rack plan.
Builder preview
Placement is only the start. Builder checks space · depth · weight, power headroom, dependencies, and compatible signal paths around this exact catalog item.Open in Builder08 · Related gear, in the order you may need it.