Topping E70 Review: Mid-Tier DAC Tested and Measured

Finding a mid-tier desktop DAC that measures well, ships with balanced outputs, and doesn’t require a firmware workaround to sound right is harder than it should be. The Topping E70 sits in a position worth examining carefully , ES9028PRO-based, Bluetooth LDAC capable, with both XLR and RCA outputs and a remote. It lands in the middle of Topping’s own lineup, above the entry-level E50 and below the Velvet variant.

That positioning matters. Owner reports and community measurement data tell a consistent story about what this DAC does well and where the trade-offs land. What follows draws on those sources , ASR measurements, Head-Fi owner threads, and verified buyer consensus , to give you an honest account of whether the E70 earns its place in the mid-tier DAC conversation.

What to Look For in a Mid-Tier Desktop DAC

Chip Architecture and Measurements

The DAC chip is not the whole story, but it is the most discussed variable in this segment, and for good reason. ES9028PRO, AK4499EX, and the various ESS Sabre derivatives each have characteristic measurement signatures , distortion floors, noise performance, filter behavior , that show up consistently in third-party bench tests. Audio Science Review’s methodology is the clearest reference point here: SINAD, THD+N, and dynamic range measurements at line level tell you whether a DAC’s analog output stage is doing justice to its chip.

For the E70 specifically, the ES9028PRO is not the highest-spec chip in Topping’s portfolio. That distinction goes to the E70 Velvet’s AK4499EX. The measurement gap is real but narrower than marketing language implies. For most playback chains , including planars driven by a solid amp , the ES9028PRO’s performance floor is far above audibility thresholds. Buyers who want to confirm this should look at ASR’s published SINAD figures for both E70 variants before treating the chip difference as a dealbreaker.

The output stage matters as much as the chip. A well-implemented ES9028PRO will outperform a poorly implemented AK4-series chip. Topping’s reputation in this segment rests on tight output stage execution, and the E70’s measurements reflect that consistency.

Balanced vs. Single-Ended Outputs

The presence of balanced XLR outputs on a DAC in this price band is meaningful , not because balanced connections eliminate noise in a well-shielded home environment, but because many mid-tier amplifiers perform best or exclusively at their balanced inputs. A DAC without XLR outputs creates a mismatch with amplifiers like the Topping A90 or the SMSL SH-9, which offer measurably lower distortion through their balanced inputs.

Single-ended RCA outputs remain fully functional and appropriate for most headphone amplifiers. The E70’s inclusion of both means you are not locked out of balanced-chain builds now, and you are not paying for outputs you cannot use if your current amp is RCA-only. That flexibility has genuine value for buyers who expect to upgrade their amp separately.

Connectivity: Wired Digital and Bluetooth

USB input is the baseline expectation and the E70 meets it cleanly , PCM to 768kHz and DSD512, which exceeds anything a streaming service currently delivers. The more interesting connectivity discussion is Bluetooth LDAC support, which matters specifically for buyers who want to use the E70 with a phone or laptop without a USB cable on the desk.

LDAC at 990kbps is the highest-bandwidth Bluetooth audio codec currently available outside of proprietary implementations. Whether that translates to audible differences from CD-quality USB playback is genuinely debated; the measured performance of LDAC under ideal conditions is close to lossless. What matters practically is that the E70’s Bluetooth implementation is not an afterthought , it is a usable input, not a feature checkbox.

Optical and coaxial inputs round out the connection options and make the E70 viable as a hub for a larger desktop setup, not just a single-source headphone stack. Buyers building systems with multiple sources , a TV, a turntable’s phono stage output, a game console , will find the input selection genuinely useful.

Remote Control and Ergonomics

A physical remote is not a standard feature at this price tier. Topping’s inclusion of one acknowledges that desktop DAC users often want to adjust volume or switch inputs from across the room. The E70 has a built-in volume control, which adds a layer of system flexibility , though buyers using it purely as a fixed-output DAC feeding a preamplifier will not use this feature.

Before committing to a mid-tier DAC, exploring the full range of desktop DAC options is worth the time , particularly if your amplifier’s input configuration hasn’t been finalized. Output matching between DAC and amp is where most mid-tier buyers leave performance on the table.

Top Picks

Topping E70 DAC

The Topping E70 makes the case for mid-tier separates clearly: ES9028PRO chip, LDAC Bluetooth, balanced XLR and RCA outputs, remote control, and a measurement signature that holds up against ASR’s line-level benchmarks. Owner consensus on Head-Fi and ASR’s forums is positive without being uncritical , most buyers note clean audio performance, some note that the E70 Velvet (AK4499EX-based) sits close enough in the Topping lineup to prompt comparison.

The chip hierarchy is real and documented. ES9028PRO delivers strong SINAD and THD+N numbers; the AK4499EX in the Velvet edges it on paper. In a headphone-focused playback chain , particularly with dynamic drivers like the Sennheiser HD600 or Hifiman planar magnetics , the gap between the two chips is not audibly meaningful for most listeners. Where the E70 earns its position is not in winning chip benchmark comparisons, but in delivering a clean, flexible, well-connected output stage at a price that leaves room for amplifier investment.

Verified buyers consistently note the build quality as above average for the mid-tier: front panel display, solid chassis, and a remote that works reliably. One point that comes up in owner threads: the E70 has no headphone output. It is a pure DAC in the traditional separates sense. Buyers expecting an all-in-one solution should look at the Topping DX series; buyers who already own or plan to own a dedicated headphone amp will find the E70’s focused design appropriate.

The planar magnetic community’s experience with source-dependent behavior is worth taking seriously here. Field reports from Sundara and HE400se owners suggest the E70’s clean balanced output makes a measurable difference when feeding amplifiers like the A90 or Ferrum OOR at their balanced inputs. Whether that translates to audible improvement over a well-implemented single-ended chain depends on the amplifier and individual listening sensitivity , but the capability is there when the downstream chain can use it.

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Buying Guide

Understanding the E70’s Position in Topping’s Lineup

Topping’s DAC range is dense enough that buyers can easily end up between products. The E70 sits above the E50 (ES9068AS-based, no balanced output) and below the E70 Velvet (AK4499EX, higher measured performance). The relevant question is not whether the Velvet measures better , it does , but whether that measurement delta changes anything in a real listening chain.

For buyers whose amplifier is RCA-only, the balanced output advantage of either E70 variant is untapped. For buyers pairing the DAC with a balanced-input amp, the E70’s XLR outputs are fully usable and the chip-level performance difference between E70 and E70 Velvet rarely surfaces as an audible concern at normal listening levels.

Do You Actually Need Bluetooth?

LDAC support is not a reason to choose the E70 on its own, but it becomes a meaningful feature in specific use cases. Desktop workers who listen to music from a phone during the day , and want to avoid plugging in a USB cable every session , will get genuine utility from a stable LDAC connection. The E70’s Bluetooth implementation handles this cleanly according to owner reports, with no reported dropouts under normal desktop distances.

Buyers who listen exclusively from a PC or dedicated streamer over USB will not use Bluetooth at all. That is a perfectly valid use case; the E70’s USB performance does not suffer because LDAC is present. Bluetooth is additive, not compromising to the wired signal path.

Output Matching: DAC to Amp

The E70’s output impedance and voltage level are suited to most mid-tier headphone amplifiers. Balanced XLR output gives the downstream amp more voltage swing to work with, which matters for high-impedance or low-sensitivity headphones. Topping’s own A90 Discrete, the SMSL SH-9, and similar balanced-input amplifiers pair cleanly with the E70’s balanced output.

Single-ended RCA pairing with amplifiers like the Magni, Atom, or similar is also clean and appropriate. The E70 will not be a limiting factor in either pairing at normal listening levels. Understanding how desktop DACs fit into a full playback chain before buying separates is the most practical step a new buyer can take.

The No-Headphone-Output Consideration

Every prospective E70 buyer should confront this directly: the E70 has no headphone output. It is a line-level DAC only. Buyers who want a single box to handle both DAC and headphone amplification should look at the Topping DX5 or similar all-in-one units.

For buyers building a separates stack , DAC plus dedicated headphone amplifier , the E70’s focused design is an advantage. A dedicated amplifier will outperform the headphone output of any integrated DAC/amp at this price tier. The separates path is more complex and requires two components, but the performance ceiling is higher and each component can be upgraded independently. Planar magnetics, which tend to reward better source and amplification, benefit most from this architecture.

Balanced vs. Single-Ended in Practice

The practical benefit of balanced outputs is chain-dependent. Balanced operation reduces common-mode noise in longer cable runs , less relevant on a desktop , and doubles the voltage swing available to a balanced-input amplifier. The second point matters more than the first for headphone listeners.

Buyers who own or plan to own a balanced-input amplifier should treat the E70’s XLR outputs as a genuine feature. Buyers who currently use a single-ended amp have no immediate use for the XLR outputs, though they preserve the option for future upgrades without requiring a new DAC.

Frequently Asked Questions

How does the Topping E70 compare to the E70 Velvet?

The E70 uses the ES9028PRO chip; the E70 Velvet uses the AK4499EX. ASR measurements show the Velvet edges ahead in SINAD and THD+N. In a real headphone listening chain, the audible difference between the two is minimal for most listeners at normal volumes. Buyers with a balanced-input amplifier and high-resolution headphones who want the best available measurement performance should consider the Velvet.

Does the Topping E70 work without a separate amplifier?

No. The Topping E70 has no headphone output. It is a line-level DAC with balanced XLR and single-ended RCA outputs. You must pair it with a separate headphone amplifier or connect it to powered speakers to hear audio.

Is LDAC Bluetooth actually useful on a desktop DAC?

For users who stream audio from a smartphone or tablet to their desktop system, LDAC at 990kbps provides the highest-quality Bluetooth audio currently available from a consumer codec. Measured performance under ideal conditions approaches CD quality. For listeners who use USB from a PC exclusively, the LDAC input adds no value , though it does not affect USB performance. The feature earns its place for hybrid-source users.

What amplifier should I pair with the Topping E70?

The E70’s balanced XLR outputs pair well with balanced-input amplifiers like the Topping A90 Discrete, SMSL SH-9, or similar mid-tier options. For single-ended pairing, the Schiit Magni or JDS Labs Atom Amp are clean matches. The correct answer depends on your headphones: high-impedance dynamics and planar magnetics reward balanced-input amplifiers; efficient dynamics pair fine with single-ended amps. Matching the amplifier to the headphone is as important as matching the DAC to the amplifier.

Can the Topping E70 handle high-resolution files and DSD?

Yes. The E70 supports PCM up to 768kHz and DSD512 over USB , specifications that exceed all current streaming service delivery formats and most local file libraries. Optical and coaxial inputs support lower resolution maximums as those connections impose format ceilings independent of the DAC’s capabilities. For practical purposes, any source material a listener is likely to encounter plays back through the E70 without format compatibility issues.